套轭于

例句：

1. 1. The car was securely fastened to the trailer.
   这辆车被安全地固定在拖车上。
2. 2. He attached a new key to the lock.
   他给锁上了一个新钥匙。
3. 3. The rope was securely attached to the tree.
   绳子被牢固地系在树上。