be sure of

He likes to be sure of his bodily comforts.

他注重物上舒适。

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.

她扭头看了看后面自已是否站稳了。

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

"那次考试很容易,题目答案我都有把握。"

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

信自己时，我很少怕斗争。

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

在你提供实证据时,你必须知它来源。

He is sure of himself.

他很自信。