to nullify a contract
取消合同
；取消
除，止;to nullify a contract
取消合同
to nullify an agreement
把合约作
nullify one's efforts
使某人徒劳
judges were unwilling to nullify government decisions.
法官们不愿意否定政府决策的合法性。
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。
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