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词的搭配（二）
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名词与介词搭配的一个有用公式 “名词 of A 介词 B ” （A和B也是名词） 1. 该名词为普通抽象名词 （译成“A ……B的～） the advantage of A over B (A相对于B的优点)
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the ratio of A to B (A与B之比) the effect [influence;impact] of A on/upon B (A对B的影响) the distance of A from B (A离B的距离)
![the ratio of A to B (A与B之比) the effect [influence;impact] of A on/upon B. (A对B的影响) the distance of A from B.](http://slidesplayer.com/slide/17558935/103/images/3/the+ratio+of+A+to+B+%28A%E4%B8%8EB%E4%B9%8B%E6%AF%94%29+the+effect+%5Binfluence%3Bimpact%5D+of+A+on%2Fupon+B.+%28A%E5%AF%B9B%E7%9A%84%E5%BD%B1%E5%93%8D%29+the+distance+of+A+from+B..jpg "(A离B的距离)")
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This section(节) describes(叙述) the advantages of AC over DC.
Speed is defined(定义) as the ratio of distance to time. The effect(影响) of temperature on/upon the resistance(电阻) of a semiconductor(半导体) must be considered(考虑).
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The distance of the moon from the earth’s center is 240 000 miles(英里).
“log n”denotes(指；意味) the logarithm(对数) of n to the base(底) e. 思考题：汉译英 1. 这个方法在一定(a certain)程度(extent)上类似于那个方法。 2. 该大学离火车站的距离很远。 3. 电流(current)等于(equal/be equal to)电压(voltage)与电阻(resistance)之比。
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1. This method is similar to a certain extent to that one.
2. The distance of the university from the railway station is very great. 3. Current equals/is equal to the ratio of voltage to resistance. [或者：Current equals/is equal to voltage over resistance.]
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纠错 Digital transmission need not have/does not need as high an S/N ratio as analog transmission
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