lock seal steel wire roofing nail

例句：

1. 1. I locked the door behind me and turned off the lights.
   我锁上门，关了灯。
2. 2. The thief tried to unlock the safe but failed.
   小偷试图打开保险箱但失败了。
3. 3. She locked the car doors and walked into the house.
   她把车门锁上，走进房子。