mechanical performance of material是什么意思

in the preceding years interest in mechanical flight have increased after it had become
possible to produce powerful but light-weight motors,这句话为什么翻译成自从人们成功生成了轻型动力马达 后,对飞行器的关心日益增加了,这个句子中的but怎么理解.

英语翻译
翻译标题：Mechanical Parameters and Post-Cracking Behaviour of HPFRC according to Three-Point and Four-Point Bending Test

请帮忙翻译以下句子：the contractor shall coordinate all mechanical floor and

英语翻译
2.mechanical properties
Mechanical properties mean a materials ability to carry or resist the application of mechanical forces and loads .the materials reaction to these forces is usually either deformation or fracture.
Mechanical properties are probably the most important to manufacturing processing.They determine the extent to which a material may be formed ,sheared ,or machined.
Typical forces which are applied to a material are tension ,compression ,shear ,and torsion ,these forxes are used to form and shape materials ,futhermore materrials must withstand excess amounts of these forces in product applications .since screws are used to assemble wood parts,they must absorb torsion forces .rods holding suspended fixtures must withstand excess tension forces .the head of a hammer must absorb compression forces.
(1).stress-strain .The stree-strain relationship is often used to study many mechanical properties .strees is force applied to material .it is usually measured in either pounds per square inch or kilograms per square centimeter.Strain is the change in the length of a material which is under stress .the strain measurements are given in terms of the amount of elongation(increased length)of the material per unit of length .strain is given in thousandths of an inch per inch of material or millimeters(or smaller units )per centimeter of material .for most materials ,the elongationg of a material under stress is quite small.
A stress-strain diagram ,like the one shown in Fig.1.1 is widely used to chart stress-strain relationships.The stress (force per unit area )is plotted on the vertical axis while the strain(elongation of each unit of length) is plotted on the horizontal axis .
Fig.1.1 stress strain charts are used to show the relationship of forces and how they act on a certain material
As stress is applied ,the material first resists permanent deforming .this area is in the materials released.
Applying additional stress will bring the material to its yield point .at this point ,additional strain occcurs without additional force being applied .Strain above this point is produced with smaller amounts of force .the force also produces permanent changes in the length of the material .
This elongation which is above the materials elastic limit is called plastic deformation .
As stess is increasingly applied above the yield point ,additional strain occurs .finally a maximum strain is reached and the material begins to fail .its internal structure begins to come apart .this point is called the material's ultimate strength or tensile strength .additional stress may cause a reduction in cross-sectional area and will finally cause fracture.

不懂这题的答案,求教
 _____ mechanical device has ever been invented that can satisfactorily replace teasel flower heads for raising the nap on cloth.  (A)No (B) Not the (C)Never has a (D)There is no 
答案给出选A,但是不懂其中的语法知识点,请老师详细分析下各选项,

英语翻译
The mechanical behaviors of Cu–Sn alloy wire specimens processed by the newly proposed method of
rotary draw bending are systematically investigated,mainly by considering the relationship between
the Vickers hardness (HV) on the cross section and the compressive residual energy during draw bending.It was found that during draw bending,the HV was lower than that of the specimen subjected to
wire drawing,particularly on the inside of the bend,and it was confirmed that the softening induced
by plastic deformation is promoted by increasing the compressive residual energy.The changes in HV
and compressive residual energy were closely related.Consequently,there was a large difference in the
hardness distributions on the inside and outside of the bend,and the mechanical properties of the wire
specimen changed greatly during draw bending.Additionally,the change in the texture resulting from
draw bending obtained by the finite element method (FEM) analysis of stress and the measured change
in the texture showed good qualitative agreement.

英语翻译
and if scientists have yet to creat the mechanical version of science fiction,the have begun to come close 这是个考研阅读的一个句子，怎么翻译啊
一楼的大哥把yet译错了吧，是然而。我就是不知道这个if scientists have yet to creat the mechanical version of science fiction,怎么能有否定的意思

Material & mechanical properties:IFI 100/107,Grade A 是什么材质?
Thread requirements:ASME B1.1 UNC,Class 2b 是什么螺纹标准?
Finish:Fe/Zn 3A per ASTM F1941 是哪种表面处理
同时客户还有以下要求：
1/4-20
1/2-13
我刚接触紧固件行业,很多不懂.

英语翻译
The mechanical properties given for bars are also applicable to semi-finished forgings and parts longitudinally forged with maximum cross-section 6400 mm2.

英语翻译
hydraulic ratios are combined with a mechanical force or torque ratio for optimum machine designs such as boom movements and trackdrives for an excavator.
英语大侠们,请帮我翻译一下这句话得中文意思吧,

“这些电机转子的机械强度”
翻译过来是The mechanical strengths of the rotors.
请问strength该不该加s?因为强度各不相同,想着要加s；但是又感觉strength是不可数的,加或不加都不对.
到底怎样是对的?

英语翻译
The microstructure and mechanical properties of magnesium alloys are studied after extrusion.Shapes are obtained
from commercial magnesium alloys with the help of a rarely used technology,i.e.,hydrostatic extrusion
at 100°C (a temperature much lower than the one at which new slip planes are activated).All the tests are performed with allowance for typical parameters,such as the rate of extrusion and the degree of drawing,in order
to choose appropriate conditions for fabricating a material with exceptionally fine grains,which is typical for a
structure formed as a result of equal-channel angular extrusion (ECAE).The constraints connected with this
kind of treatment are discussed as well as the effects of its parameters on the microstructure and mechanical properties of the extruded shapes.

请问这句 with
The development of mechanical timepieces spurred the search for more accurate sundials with which to regulate them.

英语翻译
Battery Limits
2.2.1 Mechanical and Structural Mechanical and structural battery limits are as follows:
• Contact point on rails for bridge wheels.
• Contact point of bridge travel bumpers.
• Contact point in the saddle of the hook.
• Mounting points for down shop festoon supports.
• Mounting points for bridge travel limit switch supports.
Battery Limits 指的是什么东西,若以上都能翻译非常感谢.

英语翻译
The photomechanical bending of azo-LCN cantilevers was monitored with a charge coupled device (CCD),and was analyzed with a program that determined the tip displacement angle between the mounting point of the cantilever and the outside edge of the tip of cantilever.
不要翻译软件翻译的版本哦
有关形状记忆聚合物的文献

求大神翻译下面的句子
Department of Mechanical and Aerospace Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6
Halla Climate Control Canada Inc., 360 University Avenue, Belleville, Ontario, Canada K8N 5T6
Received 31 October 2004; accepted 14 March 2005

这句英文语法对吗
But we do the mechanical engineering including reverse engineering and inspection by ourself.

这是什么意思?
Because of the unique combination of mechanical properties, such as better oxidation resistance and higher heat conduction at high temperature than those of WC-Co cemented carbide, Ti(C, N)-based cermets have being widely used as cutting tool materials especially in semi-finishing and finishing works on steel and cast iron.

server room,A/C room,control and mechanical rooms/spaces分别是什么意思,快

请朋友翻译,小弟进军国际市场了
原文是:zhejiang yuantong mechanical and electrical equipment (group)co.,ltd,成立于2000年.是***领先的油锯(chainsaw)汽缸和配件制造商.现有员工500余人,工程师56人,年产油锯汽缸100万套,其他各类油锯配件150万套.公司为***外众多的油锯机器厂提供配套(oem)服务.并为广大售后市场(after market)服务商提供优质配件.立足******市场,产品远销欧洲,北美,非洲,东南亚,以及俄罗斯,***等***的地区.
谢谢

英语翻译
I am an engineer majoring(majored) in Mechanical Engineering.
分词应该用majoring还是majored?
主修机械工程是大学的时候的事情,当然是过去发生的,但是如果用majored似乎有被动语态的意味,如果单从语法讲应该用现在分词才对吧?

mechanical timepieces spurred the search for more accurate sundials with which to regulate them-with whom 是什么的用法

请从事机械行业的高手来看一下,
Redundant eletronic_mechanical breaking system

将左右的单词组成表是职业的词语
taxi man
post mechanical
hair dresser
keyboard driver
car operator

英语翻译
Wave speed in a medium
The speed of a mechanical wave is constant in a given ,medium .The speed depends only on the properties of that medium .If the frequency of a wave in a given medium is changed ,then the wavelength is changed .Figure 15-7 shows two waves produced at different times in the same medium.The wavelengths and the frequencies of the waves are different .

英语翻译
A theodolite may be regarded as a mechanical eralisation of the geometry of three concurrent straight lines-the telescope axis,the so-called tiansit axis to which the telescope axis should be perpendicular,and the main rotation axis to which the transit axis should be perpendicular

英语翻译
In Europe,before the introduction of the mechanical clock,people told time by sun (using,for example,shadow sticks or sun dials) and water clocks.Sun clocks worked,of course,only on clear days; water clocks misbehaved when the temperature fell toward freezing,to say nothing of long-run drift as the result of sedimentation and clogging.Both these devices worked well in sunny climates; but in northern Europe the sun may be hidden by clouds for weeks at a time,while temperatures vary not only seasonally but from day to night.
其中这一句 to say nothing of long-run drift as the result of sedimentation and clogging.怎么翻译 漂流了怎么又沉积 阻塞了呢,还有 to say nothing of 这个词组放这里也翻译不通啊 +分

英语翻译
Once the quantum or classical mechanical treatment has
been decided upon,the description of the macroscopic behavior
starts with the identification
of the thermodynamic variables,number of particles N and
internal energy U,with the average of the corresponding
microscopic variables.That is,
^

英语翻译
一、vocabulary(translate the words of mechanical engineering) (20 points,1 point each)
x051.investment casting 2.automatic 3.ceramic
x054.cam 5.engine lathe 6.cast iron
x057.tempering 8.copper 9.ladle
x0510.hydraulic system 11.drilling 12.alloy
x0513.tetrachloride 14.half nuts 5.twist drill
x0516.strength 17.surface finish 18.tolerance
x0519.tool post 20.carriage
二、translate the following sentences（60 points,6 points each）
x051.were there no friction,transmission of motion would be impossible.
x052.an important function of a riser is to act as a reservoir of liquid metal to feed solidification within the mould.
x053.alloying is an important method of obtaining whatever special properties are required:strength,toughness,resistance to wear,magnetic properties,high electrical resistance or corrosion-resistance.
x054.the common metallic materials are such metals as iron,copper,aluminum,magnesium,nickel,titanium,lead,tin,and zinc and the alloys of these metals,such as steel brass,and bronze.
x055.one material can often be distinguished from another by means of physical properties,such as color,density,specific heat,coefficient of thermal expansion,thermal and electrical conductivity,magnetic properties,and melting point.
x056.plastics have specific properties,which may make them preferable to traditional materials for certain uses.in comparison with metals,for example,plastics have both advantages and disadvantages.
x057.organic materials will usually dissolve in organic liquids such as alcohol or carbon tetrachloride,but they will not dissolve in water.
x05 8.the nonferrous metals are generally inferior in strength but superior in corrosion resistance as compared to ferrous materials,and most are more expensive.
x05 9.the lathe bed is usually made of gray or nodular cast iron to damp vibrations and is made by casting.
x0510.many products,such as those made from colored plastic or other special materials,are more saleable because of appearance.
三、translation(20 points)
x05a lathe is a machine tool used primarily for producing surfaces of *** and flat edges.based on their purpose,construction,number of tools that can simultaneously be mounted,and degree of automation,lathes or,more accurately,lathe-type machine tools can be classified as follows:
(1)engine lathes.
x05(2)tool room lathes.
x05(3)turret lathes.
x05(4)vertical turning and boring mills.
x05(5)automatic lathes.
x05(6)special-purpose lathes.

英语翻译
Positions referenced en mechanical counters with positive Suitable for repetitive works to be made in several passes with high repositioning stop.

是关于细菌纤维的英文文献
In previous AFM studies of the mechanical properties of nanofibers,6-9 elastic moduli were calculated from deflection measurements at a single point near the center of a suspended fiber and an assumed elastic model

英语翻译
The use of mechanical dictionaries to overcome the barriers of language was first suggested in the 17th century.However,it was not until the 20th century that the first concrete proposals were made,in patents issued independently in 1933 by George Artsrouni,a French-Armenian,and by a Russian,Petr Smirnov- Troyanskii.Artsrouni designed a storage device on paper tape which could be used to find the equivalent of any word in another language; a prototype was apparently demonstrated in 1937.The proposals by Troyanskii were in retrospect more significant.He envisioned three stages of mechanical translation:first,an editor knowing only the source language was to undertake the 'logical' analysis of words into their base forms and syntactic functions; secondly,the machine was to transform sequences of base forms and functions into equivalent sequences in the target language; finally,another editor knowing only the target language was to convert this output into the normal forms of his own language.Troyanskii envisioned both bilingual and multilingual translation.Although his patent referred only to the machine which would undertake the second stage,Troyanskii believed that "the process of logical analysis could itself be mechanized".

英语翻译
英译中求助：Mechanical material data form need to be approved by Design for Environment person prior ’Approved for Production’ for the component/part/module can be reached.
thanks for your time and have a good day.

英语翻译
Not compromise the mechanical properties of the matrix.
全文：
12.3 Synthesis of microcapsules
Microcapsules are the key component of self-healing coatings.To perform
their function well,microcapsules must meet the following requirements
[22] :
• Remain intact during storage,coating formulation,and application.
• Contain suffi cient volume of chemicals with fast reaction kinetics.
• Rupture readily when the coating is damaged.
• Exhibit good adhesion with the polymer matrix.
• Not compromise the mechanical properties of the matrix.
我的翻译：
3.微胶囊的合成
微胶囊是自愈合涂层的主要组成.微胶囊需要满足以下要求以确保功能良好[22]:
在胶囊内储存时保持涂层的配方和功能完整.
包含有足量的试剂,并能快速发生反应.
当涂层被破坏时胶囊能顺利破裂.
胶囊和聚合物基体之间有良好的粘性.
是与基体的机械性能不同?compromise是表达什么意思?

英语翻译
Revision
of the mechanical operation,block and lock driving or actuating,absence of
har-
dened
movements,suitable lubrication,alignment and other necessary adjustments.

机械能量怎么求?
我在国外上学,
what is the total mechanical energy when a shopping trolley is pushed 10m with a force of 50N?Frictional force of 7.8N act on the shopping trolley.