My key is on the door

钥匙───key;门上───On the door

I've lost my key.───我把钥匙掉了.

I looked everywhere for my lost key.───我到处寻找我丢失的钥匙.

You will find a key at the front of the book.───你会在书的前面找到略语表。

There's no safety for anyone until he is under lock and key.───他不坐牢,人无宁日.

You never left the key in the lock!───你总不会把钥匙留在锁上吧!

He proved overconfident on the witness stand, misremembering a key piece of evidence.───他在证人席上表现得过于自信，记错了一条重要的证据。

A key is the part of a pianoforte that you touch to make music.───琴键是钢琴上用手指敲击的部件,它能使钢琴发出乐音.

I must have left my key in the ignition.───我肯定是把车钥匙忘在点火开关上了.