Self-confidence is to be sure of oneself and one's abilities.

自信就是肯定自己以及自己的能力。

youdao

Self-confidence is to be sure of oneself and ones abilities. It is extremely important for all to be self-confident as it is the indispensable condition to their success.

自信自信就是要相信自己和自己的能力，对于所有的人，自信都是极其重要的，因为它是获得成功必不可少的条件。

youdao

It's hard to say, but I'm sure one of the purposes is to construct a good philosophy for oneself.

很难说，但我确定大学生活的目标之一是要为自己建立一个好的人生观。

youdao