be sure

[usu. in imperative]do not fail (used to emphasize an invitation or instruction)

一定要；务必（用于强调邀请或指示）

[with infinitive]be sure to pop in.

一定要来。

[with clause]be sure that you know what is required.

务必弄清楚要求是什么。

for sure

(informal)without doubt

(非正式)毫无疑问

I can't say for sure what Giles really wanted.

我说不准贾尔斯真正想要的是什么。

(as) sure as eggs is eggs

(亦作 as sure as fate)without any doubt

千真万确，无可置疑

sure enough

(informal)used to introduce a statement that confirms something previously predicted

(非正式)果真

when X-rays were taken, sure enough, there was the needle.

拍完X光片后，果真有一根针。

sure of oneself

very confident of one's own abilities or views

非常自信

he's very sure of himself.

他非常自信。

sure thing

(informal)a certainty

(非正式)确定无疑的事情

for sure【非正式用语】

Certainly; unquestionably

确切地；毫无疑问地

We'll win for sure.

我们肯定会获胜

make sure

To establish something without doubt; make certain

弄清楚；确保

Make sure he writes it down.

让他一定记下来

to be sure

Indeed; certainly.

确实；当然