单句写作：词类

对于非英语专业的学生（尤其是理工科学生）及科技人员来说，急需学习如何把中文的论文翻译成正确且地道的英文文本，通过对多年来英文科技论文稿件中出现的大量错误进行分析得出，根本问题在于单句没写好。正确的句子即便不够完美，至少可以与外国读者正确交流科技信息，另外写作方面理论并不多，要通过大量实践才能掌握必要的写作的技巧。

冠词

艾米特博士2001年毕业于哈佛大学。
Dr.Emmit graduated form Harvard University in 2001.
李教授1988年在西安理工大学获得机械工程博士学位。
Professior Li earned his Ph.D. degree in mechanical engineering from Xi’an University of Technology in 1988.
现在我们转向讨论一下局域网。
Now we shall turn to the discussion of local area networks.
Bainbridge质谱仪是与光谱仪一样重要的仪器。
The* Bainbridge mass spectrometer is as important an instrument as the optical spectrometer.
做这个实验需要多长时间？
How much time is required to this experiment?
压力的增加总会引起体积的减少。
An increase of* pressure always causes a decrease in volume.
图2-5画出了式2-2所表示的情况。
Fig. 2-5* shows what is expressed by Eq. 2-2.
电感的单位是亨利。
The unit of* inductance is henry.

连接词

该电路由一个电池、一个电感器和一个电容器组成。
This circuit contists of a battery, an inducor and a capacitor.
试计算在A,B,C三点处的电场。
Compute the electric field at points A,B and C.
这颗卫星用于美国与英国、法国、意大利之间的通信。
This satellite is used for communication between US and UK,France and Italy.
我们假设该天线是垂直的，且其损耗为零。
We assume that the antenna is vertical and that its loss is zero.
第6、7、8章论述传输线。
Chapters 6,7 and 8* deal with transmission lines.

数词

这两个参数之差为百万分之十九。
The difference between this two parameters is nineteen parts per million.
该数值约比理想值大3.5倍。
This value is nearly 3.5 times greater than the ideal one.
这个元件上的电流为零点零几安。
The electric current through the component is a few hundredths of an ampere.
该电阻器上的电压为总电压的2/5。
The voltage across this resister is two fifths that of the total voltage.
已证明用三角形来描述电信号是很有价值的。
Using trigonometry to describe electrical signals has proved very valuable.
其误差为千亿分之六。
Its error is six parts in 10¹¹.
这台计算机所存储的信息比那台多三倍。
This computer stores four times more information than that one does.
不久的将来对这种设备的需求量为现在的20倍。
The demand for this kind of equipment in the near future will be 20 times what it is.
这个元件上的电压为零点几伏特。
The voltage across this component is a few tenths of a volt.
现在其内部的压力被减少了15倍。
Now its internal pressure is one sixteenth what it was.

介词

发射这颗卫星是为了获取有关地球的信息。
The satellite was launched to obtain information on the earth.
我们必须解出这个方程把那个未知数求出来。
We have to solve this equation for the unkonwn.
第三、四章介绍了设计天线的新方法。
Chapters 3 and 4 introduce a new method for designing atenna.
物理对了解宇宙是至关重要的。
Physica is vital to understand universe.
这个现象说明了牛顿的运动定理。
This phenomenon illustrates Newton’s laws of motion.
这种新型计算机与普通计算机相比有很多优点。
This new type of computer has many advantages over the general type.
在这新的五章中，第一章论述负反馈的基本原理。
Of* this five new chapters, the first one deals with the basic principles of negetive feedback.
这时电流与电压相位相差90度。
At* this point, current differs in phase from voltage by 90°.
通过分析该仪器的参数，我们就能够了解他的性能。
By analysing / Through analysis of* the parameters of the instrument, we can understand it in performance.
我们要求出他在这一段距离上的平局速度。
We will find out its average velocity over this distance.
他们极为困难的解出了这道题。
They solve this problem with great difficult.
在A,B,C三点钟只有A点接地。
Among* points A,B,C, only point A connects ground.
他俩身高相同。
They are of same height.
频率用赫兹来衡量。
Frequency is measured by hertz.
万有引力就是所有物体相互吸引的趋势。
Gravity is the tendency of all objects to attract, and be attracted by, each other.

动词

有许多问题有待于解决，既包括技术问题，也包括财政问题。
There are many problem remains to be solved, both technical problems and financial problems.

副词

他对这个领域的贡献怎么强调都不过分。
The contribution he made in this field cannot be overemphasized.
这个系数的典型值是0.35。
The value of this coefficient is typically 0.35.

形容词

涉及的问题很多。
The problems involved are many.
速度快，安全性高，高铁为我们提供更便利的出行方式。
High* in speed, safe in quality, CHR provide us a more convenient mean of transport.