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英语翻译
There are three kinds of circuits:the series circuit,the parallel circuit,and the series-parallel circuit .They are shown in fig.1 In a circuit,each of the parts has some resistance:the electrical source or the signal generator,the connecting conductors connecting conductors,and the apparatus itself.Thus,if every part has some resistance,no matter how small,there must be a voltage drop on it when the current is flowing through.This voltage drop is equal to the product of the current and the resistance,hence it is called the IR drop.And this is also called Ohm's law.A basic circuit is shown in fig.2The voltage drop on the resistance is:U=IR.Here,I means the current,and R means the resistance,and U is the voltage drop.

请问下面这句话语法是否正确?
Proficient in analog and digital circuits enhanced through work experience
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英语翻译
The nature of electrical signals in electronic circuits readily enables the technology to be divided into classes.One of the classes is analog electronics; another is digital electronics.Both analog and digital electronics use similar electronic elements,but the manner of use is different,and the technologies appear to be quite distinct.For this reason we shall study them separately until we bring them together as they invariably unite in instrumentation and applications.

Intergrated circuits soon led to the development of yet smaller,cheaper computers.
of yet 怎么应用,帮忙多举例说明一下哈.

英语翻译
2-1 Introduction
Three-phase circuits are very important because almost all electric power is generated and distributed three-phase.The basic component of a three-phase circuit is an ac voltage generator,also called an alternator,that produces three voltages of the same peak values but with phase angle differences of 120º.The alternator windings are interconnected such that the electrical energy goes out over either three or four wires.
As will be seen,a three-phase circuit has advantages as compared to a single-phase circuit---a circuit having just a single voltage supply.It also has advantages over a two-phase circuit,which is a circuit energized by an ac voltage generator that produces two voltages of the same peak value but that are phase-displaced by 90º.Except for a few special applications,three-phase circuits are more advantageous than circuits of a greater number of phases.As a result,three-phase power generation,distribution,and utilization will be important for the foreseeable future.
2-2 Three-phase voltage generation
As stated,a three-phase voltage generator produces three voltages having the same peak value but differing in phase angle by 120º.Naturally,all three voltages are of the same frequency.These voltages may be across just three wires,to form a three-wire,three-phase circuit.Or these voltages may be between three wires and a neutral wire,to form a four-wire,three-phase circuit.We will now consider the generation of these voltage.
For a balanced three-phase circuit,three sinusoidal voltages add to zero at every instant if they have the same peak value and frequency but are phase-displaced by 120º.This means that the vertical heights of the three curves add to zero at every point along the horizontal axis.The fact that these sinusoids correspond to voltages has no bearing on their sum being zero.

For circuits that contain capacitors and resistors:
A capacitor that is empty allows the flow of current such as a wire
A capacitor that is full acts like a broken wire
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