科技文章中經(jīng)常使用若干特定的句型，從而形成科技文體區(qū)別于其他文體的標(biāo)志。例如It——that——結(jié)構(gòu)句型；被動(dòng)態(tài)結(jié)構(gòu)句型；結(jié)構(gòu)句型，分詞短語(yǔ)結(jié)構(gòu)句型，省略句結(jié)構(gòu)句型等。
舉例如下：
It is evident that a well lubricated bearing turns more easily than a dry one.
顯然，潤(rùn)滑好的軸承，比不潤(rùn)滑的軸承容易轉(zhuǎn)動(dòng)。
It seems that these two branches of science are mutually dependent and interacting.
看來這兩個(gè)科學(xué)分支是相互依存，相互作用的。
It has been proved that induced voltage causes a current to flow in opposition to the force producing it.
已經(jīng)證明，感應(yīng)電壓使電流的方向與產(chǎn)生電流的磁場(chǎng)力方向相反。
It was not until the 19th century that heat was considered as a form of energy.
直到十九世紀(jì)人們才認(rèn)識(shí)到熱是能量的一種形式。
Computers may be classified as analog and digital.
計(jì)算機(jī)可分為模擬計(jì)算機(jī)和數(shù)字計(jì)算機(jī)兩種。
The switching time of the new-type transistor is shortened three times.
新型晶體管的開關(guān)時(shí)間縮短了三分之二。（或——縮短為三分之一。）
This steel alloy is believed to be the best available here .
人們認(rèn)為這種合金鋼是這里能提供的最好的合金鋼。
Electromagnetic waves travel at the same speed as light.
電磁波傳送的'速度和光速相同。
Microcomputers are very small in size ,as is shown in Fig.5.
如圖5所示，微型計(jì)算機(jī)體積很小。
In water sound travels nearly five times as fast as in air.
聲音在水中的傳播速度幾乎是在空氣中傳播速度的五倍。
Compared with hydrogen, oxygen is nearly 16 times as heavy.
氧與氫比較，重量大約是它的十六倍。
The resistance being very high, the current in the circuit was low.
由于電阻很大，電路中通過的電流就小。
Ice keeps the same temperature while melting.
冰在溶化時(shí)，其溫度保持不變。
An object, once in motion, will keep on moving because of its inertia.
物體一旦運(yùn)動(dòng)，就會(huì)因慣性而持續(xù)運(yùn)動(dòng)。
All substances, whether gaseous, liquid or solid ,are made of atoms .
一切物質(zhì)，不論是氣態(tài)、液態(tài)，還是固態(tài)，都由原子組成。
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