nullify 雅思GREGMAT

to nullify a contract

取消合同

to nullify an agreement

把合约作

nullify one's efforts

使人徒劳

judges were unwilling to nullify government decisions.

法官们不愿意府决策的合法性。

insulin can block the release of the hormone and thereby nullify the effects of training.

胰岛素能阻碍激素的释放，从而抵消训练的效果。