be sure of

He likes to be sure of his bodily comforts.

他注重物质上的舒适。

I rarely flinch from a fight when I'm sure of myself.

确信自己时，我很少怕斗争。

She looked over her shoulder to be sure of her footing.

她扭头看了看后面以确认自已稳了。

When you adduce evidence of this nature, you must be sure of your sources.

在提供实质性的证据时,必须确知它的来源。

In that way one is sure of accepting no humbug.

如一人必骗。

The examination was a pushover; I'm sure of all the answers.

"那次考试很容易,题目的答案我全都有把握。"

He is sure of himself.

他很自信。