Cathamplifier
[電] 反對放大器
??? 情景例句
Well, here's the bottle opener, and here's the flashlight.
哦 ，這是開瓶器 ，這是手電筒。
Yes, we have done a little. But we have just started and have nothing to show you.
有，我們做了一些，但是因為我們才剛起步，并沒有任何資料可以提供給你們。
It did not take the firefighters long to put out the fire, and they at once started to look for causes of the fire.
消防隊員沒花多時間就把大火撲滅了，他們馬上開始調查火災發生的原因。