And remember you don't need a certain number of friends just a number of friends you can be certain of.

请记住，你不需要一定数量的朋友，只要有一些你可以确定的朋友就够了。

Profession knowledge that study, holidays that work practice, make me the backlog certain of experience.

专业知识的学习，假期的工作实践，使我积累了一定的经验。

The mental powers whose union in a certain of relation constitutes genius are imagination and und…

天才是想像力和知性两种能力在一定关系里结合起来构成的。

I'm usually fairly skeptical about any research that concludes that people are either happier or unhappier or more or less certain of themselves than they were 50 years old.

我通常怀疑一些研究所得出的结论认为，自己一定或多或少比50岁的时候快乐或不快乐。

He always makes certain of every step.

他总是弄清楚每个步骤。

Please make certain of all the details.

请你弄清楚所有的细节。

We must make certain of the cause of this problem.

我们必须弄清楚这个问题的原因。

I need to make certain of the truth about this matter.

我需要弄清楚这件事的真相。

Make certain of his safe arrival.

要确保他安全到达.

We are certain of winning the game.

我们确信能赢得比赛。