kill off

柯林斯词典

kill off (killing,killed,kills)

• 1. →see kill

• 2. PHRASAL VERB If you say that a group or an amount of something has been killed off, you mean that all of them or all of it have been killed or destroyed. 杀光; 把…灭绝

  Their natural predators have been killed off. 他们的天敌已被灭绝。

  It is an effective treatment for the bacteria and does kill it off. 这是一种有效的灭菌方法，确实把细菌都杀光了。

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