hook attachment for trailer

例句：

1. 1. The towing hitch on thetruck is securely attached to the trailer.
   卡车上的拖车挂钩牢固地连接到拖车上。
2. 2. The trailer hitch was designed toeasily attach to the back of the truck.
   拖车挂钩设计得可以轻松连接到卡车的后面。
3. 3. The trailer hitch allows thetrailer to be easily pulled behind the truck.
   拖车挂钩使拖车能够轻松地被拖在卡车后面。