towing loop

例句：

1. 1. The car was towing a heavy load on the highway.
   汽车在高速公路上拖着沉重的货物。
2. 2. The towing loop was securely fastened to the trailer.
   牵引环牢固地固定在拖车架上。
3. 3. The driver had to use the towing loop to pull the car out of the ditch.
   司机不得不使用牵引环将车从沟里拉出来。