concentration

应该指的是一个大专业下的方向吧。供参考。

前者表示在某物上的专注力后者表示某物的浓度concentration[英] [u02ccku0252nsnu02c8treu026au0283n][美] [u02cckɑ:nsnu02c8treu026au0283n]n.浓度; 集中; 专心; 关注;

concentration level 英[u02ccku0254nsu0259nu02c8treiu0283u0259n u02c8levl] 美[u02cckɑnsu0259nu02c8treu0283u0259n u02c8lu025bvu0259l] [词典] 浓度级; [例句]Pranayama develops and improves the concentration level as well as focus.呼吸控制法提升和改善专注力。Use of the design is easy to underground, regardless of user"s experience,language skills, or current concentration level. 不论使用者的经验、知识、语言能力、集中力等因素，皆可容易操作。TVOC concentration is an important indicator of the evaluation of indoor air quality,the high concentration level of TVOC will impact on human health significantly.TVOC浓度是评价室内空气质量的重要指标，高浓度的TVOC会对人体健康造成重大影响。

focus 是焦点而 concentration 是集中力 / 专心

outpacing 战略=追赶战略跟随型战略;concentration 战略=集中战略集中化战略;把经营战略的重点放在一个特定的目标市场上，为特定的地区或特定的购买者集团提供特殊的产品或服务。combination 战略=组合战略战略组合;

AcSEC 对该准则的运用提及了两点。在运用重要性准则时，公司必须考虑预测数可能有所变动的重要性, 而不是财务报表上报告金额的重要性。关键因素是可能变动的重要性。 其次，如果一个主体运用了一些降低风险的技术，如套期保值或保险购买，来降低特定情况下的风险，那么，鼓励披露该项不确定性，但这种披露并非必需。SOP 94-6 对于长期资产损失的会计处理与最近出台的SFAS 第121号文件有本质区别。SFAS 第121号文件要求主体在每个年度末对长期资产可能发生的损失进行测试，主体就会因此而查找已经发生的长期资产损失。而SOP 94-6 则要求进行一个预测性的评估。主体就必须要合理预测下一年度可能发生的变化。而且，SFAS 第121号文件只运用于资产。SOP 94-6运用更广，它适用于任何一项涉及预测的财务报表项目。concentration我想要结合上下文来考虑，有可能指资产重组中资产整合，也有可能与合并等有关系。要具体情况具体对待。

慎重权衡

To have a meaningful discussion of the chemical aspects of groundw ater，the relative amounts of solute ( the dissolved inorganic or organic constituents) and the solvent ( the w ater) must be specified. This is accomplished by means of concentrations units. Various types of concentration units are in use.Molality is defined as the number of moles of solute dissolved in a 1 kg mass of solution. This is an SI unit w ith the symbol mol / kg. The derived SI symbol for this quantity is mB， w here B denotes the solute. A is normally used to designate the solvent. One mole of a compound is the equivalent of one molecular w eight.Molarity is the number of moles of solute in 1 m3of solution. The SI unit for molarity is designated as mol / m3. It is useful to note that 1 mol / m3equals 1 mmol / L. Moles per liter， w ith the symbol mol / L，is a permitted unit for molarity in the SI system and is commonly used in groundw ater studies.Mass concentration is the mass of solute dissolved in a specified unit volume of solution. The SI unit for this quantity is kilograms per cubic meter，with the symbol kg / m3. Grams per liter ( g / L ) is a permitted SI unit. The most common mass concentration unit reported in the groundwater literature is milligrams per liter ( mg / L) . Since 1 mg / L equals 1 g / m3，there is no difference in the magnitude of this unit ( mg / L) and the permitted SI concentration unit ( g / m3) .There are many other non-SI concentration units that commonly appear in the groundw ater literature. Equivalents per liter ( epL ) is the number of moles of solute，multiplied by the valence of the solute species，in 1 liter of solution: Equivalents per million ( epm) is the number of moles of solute multiplied by the valence of the solute species，in 106g of solution，or this can be stated as the number of milligram equivalents of solute per kilogram of solution:Parts per million ( ppm) is the number of grams of solute per million grams of solutionFor nonsaline w aters，1 ppm equals 1 g / m3or 1 mg / L. Mole fraction ( xB) is the ratio of the number of moles of a given solute species to the total number of moles of all components in the solution. If nBis moles of solute，nAis moles of solvent，and nC，nD，… denote moles of other solutes，the mole fraction of solute B isor xBfor aqueous solutions can be expressed asw here m denotes molality.In procedures of chemical analysis，quantities are most conveniently obtained by use of volumetric glassw are. Concentrations are therefore usually expressed in the laboratory in terms of solute mass in a given volume of w ater. Most chemical laboratories report analytical results in milligrams per liter or，in SI units，as kilograms per cubic meter. When the results of chemical analyses are used in a geochemical context，it is usually necessary to use data expressed in molality or molarity，since elements combine to form compounds according to relations betw een moles rather than mass or w eight amounts. To convert betw een molarity and kilograms per cubic meter or milligrams per liter，the follow ing relation is used:水文地质专业英语If the w ater does not have large concentrations of total dissolved solids and if the temperature is close to 4℃ ，1 L of solution w eighs 1 kg，in w hich case molality and molarity are equivalent and 1 mg / L = 1 ppm. For most practical purposes，w ater w ith less than about 10000 mg / L total dissolved solids and at temperatures below about 100℃ can be considered to have a density close enough to 1 kg / L for the unit equivalents above to be used. If the w ater has higher salinity or temperature，density corrections should be used w hen converting betw een units w ith mass and volume denominators. ( Source: Freeze et al. ，1979)水文地质专业英语水文地质专业英语