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1·This is an alternating current generator.

这是一台交流发电机。

2·Nicola Tesla invents alternating current.

尼古拉·特斯拉发明了交流电。

3·With the alternating current, things are different.

对于交流电来说，情况就不同了。

4·This vibration creates an alternating current that can be tapped.

电子振动又产生了可以利用的交变电流。

5·Mains electricity in America is supplied as alternating current at 60 Hertz.

在美国，主要供应频率为60赫兹的交流电。

6·Alternating current is the current whose direction changes periodically.

交流电是其方向周期地变化的电流。

7·Diodes are electronic devices which rectify alternating current to direct current.

二极管是将交流电整流成直流电的电子装置。

8·A device, such as a diode, that converts alternating current to direct current.

整流器；整流管一种将交流电流转化为直流电流的装置，如二极管。

9·For reasons the alternating current is more widely used than the direct current.

由于种种原因，交流电比直流电用得更为广泛。

10·We can also call it an 'alternator', because it generates alternating current (AC).

我们可以也称之为'发电机'，因为它产生交流电(AC)。