be sure of

He likes to be sure of his bodily comforts.

他注重物质上的舒适。

In that way one is sure of accepting no humbug.

如是一人必不至被骗。

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

她扭头看了看后面以认已是否站稳了。

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

信己时，我很少怕斗争。

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

"那次试很容易,题目的答案我全都有把握。"

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

在你提供实质性的证据时,你必须知它的来。

He is sure of himself.

他很信。