译文：只要知道电压和电流，就能测定电阻。 。
Thee resistance can be determined provided that the voltage and current are known.
只要知道电压和电流，就能测定电阻。
The resistance can be determined provided that the voltage and current are known.
在绝缘体中测定通过的电流是很困难的。
It is very difficult to measure the passing current in insulators.
在绝缘体中测定通过的电流是很困难的。
It is very difficult to measure the passing current in insulators.
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