The fisherman cast off the rope and set the boat adrift.

渔解开缆绳, 让船漂流而去。

The millionaire cast off his daughter when she married a poor young man.

当那个百万富翁的儿嫁给一个穷小子时, 他断绝了和儿的关。

Jack cast off our moorings.

解开我们的缆。