★strike （struck, struck） v. 打，擊；敲，彈（鐘，樂(lè)器等）

① v. 打，擊 She struck the man in the face.

② v. 敲，彈（鐘，樂(lè)器等）

It would strike twelve in twenty minutes' time.

strike the clock （人）敲鐘

clock strike 鐘自己響: Listen, the clock is striking.

strike twelve 數(shù)字表示敲擊的次數(shù)

關(guān)于敲黑板：

He is striking the blackboard. 他正在敲黑板。（動(dòng)作，真的在敲）

Attention, please. 在群里說(shuō)：‘敲黑板啦“