| 1. | This is alternating current .
这就是交流电。 |
| 2. | Either direct or alternating current may be used for driving electric trains .
直流电和交流电都可用来驱动电气火车。 |
| 3. | The beating of heart induces alternating currents in the surrounding tissues .
心脏的搏动在其周围组织中感应出交流电流。 |
| 4. | Resistance thermometer bridges may be excited from either a-c or d-c sources .
电阻温度计电桥的供电可以是交流电源，也可以是直流电源。 |
| 5. | This high frequency alternating current produces the high frequency radio waves mentioned in the previous chapter .
这种高频交流电流产生前一章提到过的高频无线电波。 |
| 6. | The difference between a direct and an alternating current is that a direct current always flows in one direction .
直流电和交流电的区别在于直流电总是向一个方向流动。 |
| 7. | A . c . motor capacitors - motor start capacitors
交流电动机电容器.电动机起动电容器 |
| 8. | General technical requirements for fan a . c . motoes
交流电风扇电动机通用技术条件 |
| 9. | Microcomputer alternating current resistivity instrument
微机化交流电阻率仪器 |
| 10. | Alternate currents make people feel it ' s unstable
交流电总给人一种不稳定的感觉。 |
