On many occasions demonstrators were bound over to keep the peace.

很多情况下，示威者都要具保不闹事。

They put us in a cell, and the next day some bumbling judge bound us over. [VERB noun PREP.]

他们把我们关进监狱，第二天一个糊涂法官令我们具结保证。

This imposes a duty on courts to bind over parents when they have no control over their children. [VERB PREP. noun]

这就使法庭有义务在无权控制孩子的时候命令其父母具结保证。