lock-in

例句：

1. 1.The door was locked from the inside.
   门从里面被锁上了。
2. 2. She locked the door behind her when she left.
   她离开时把门锁上了。
3. 3. The security system is designed to lock in all doors and windows.
   这个安全系统设计成可以锁定所有门窗。