forelock key

例句：

1. 1. Theforelock key was the only thingthat could open the door.
   前锁钥匙是唯一能打开门的东西。
2. 2. Hekept his forelockkey in his pocket at alltimes.
   他时刻把前锁钥匙放在口袋里。
3. 3. The forelock key wasa symbol of trust and security.
   前锁钥匙是信任和安全的象征。