欧洲的交流电输出频率通常为50赫兹。In Europe, AC is usually generated at 50 Hz.你可在短波37.5赫兹上收到我们的节目.You can receive our program at short wave 37.5 MH.频率用赫兹即每秒钟的周数来计算.Frequency is measured in hertz, or cycles per second....
They were the dupes of a clever but dishonest salesman.他们被一个聪明但不诚实的推销员骗了。Always there were fresh dupes waiting to be seduced by him.总能冒出些傻瓜蛋,生生等着受他的煽惑.Why did Blizzard Entertainment only delete some of the dupes, and not...