He locked the bag and put the key in his pocket.他锁好了包并把钥匙放进了口袋。

Where are my car keys?我的车钥匙在哪里？

The key to our victory was the fact we believed in ourselves.我们取得胜利的关键是自信。

A new witness may provide the key to the mystery.一个新的目击者也许能提供解开谜团的关键线索。

She ran her fingers lightly over the piano keys.她的手指轻巧地划过钢琴琴键。

Press the hash key now.现在按下井号健。