key on

例句：

1. 1. 打开
   门
2. 1. Please key the door for me.
   请帮我把门打开。
3. 2. The lock on the safe is broken.
   保险箱的锁坏了。
4. 3. Turn on the lights and let's go out.
   打开灯，我们出去吧。