Triac
n. 三端雙向可控硅開關元件\\n[計] 三端可控硅器件
??? 情景例句
and you can listen to him over the phone.
而且你可以在電話中聽到他的聲音。
When did you take the examination?
你什么時候去參加考試？
I doubt it.
我懷疑。