handgun 专八

1.The government has imposed a ban on the sale of handguns.

政府下令禁止售手。

2.The Capacitor turns the signal in antiphrasis, the only thing whole. The Earphones do such long ago. The Shot of the handgun not audible.

什么是积极保护？基本原理是：发射和接收信号---一个放大器，一个晶体管---一个可变电阻的电容器---一个扬声器或射极的输。