make sure

be sure or certain务必

Father makes sure that all the lights are off before he goes to bed．父亲在确认所有的灯都关了以后才上床。

Let's make sure that it has been finished．让我们搞清楚这工作是否确实已完成。

We must make sure of the facts．我们必须把事实搞清楚。

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