系结物

例句：

1. 1. The car was securely fastened to the trailer with a strong hitch.
   这辆车用坚固的钩子牢固地系在拖车上。
2. 2. The sailor tied a big knot in the rope to secure it.
   水手在绳子上打了个大结来固定它。
3. 3. The thief used a small knife to cut through the lock and open the safe.
   小偷用一把小刀割断了锁，打开了保险箱。