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

渔夫解开缆绳, 让船漂流而去。

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

当那翁的儿嫁穷小子时, 他断绝了和儿的关系。

Jack cast off our moorings.

杰克解开我们的系缆。