Act or instance of knocking out.

打倒；击昏。

Stunningly attractive person or thing.

【口】引人注目的人或物。

Small piece of flat surface of metal or plastic prepared to be easily forced out where a hole is needed.

(盒子等上面的)一小块金属或塑胶片(可以轻易拿开以取里面的东西)。