to nullify a contract
取消合同
无效，作
；取消
无效;
;
除，止;to nullify a contract
取消合同
to nullify an agreement
把合约作
nullify one's efforts
某人徒劳
judges were unwilling to nullify government decisions.
法官们不愿意否定政
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。
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