By taking concrete actions that improve your competence, your self-image, you can increase that self-confidence, without the help of anyone else.

通过采取具体的行动来增强你的能力，改善你的自我形象，你自己能够增加你的自信，而不需要别人的帮助。

youdao

These sorts of comments are a sort of self-fulfilling prophecy, an effective vote of no confidence that tells the market that Portugal can't go on without a bailout.

这是一种自我实现能力很强的预测，说明人们对告诉市场必须向葡萄牙实施救助这个事实缺乏信心。

youdao

Without self-confidence, one can not do well in anything.

没有自信，一个人就不能做好任何事。

youdao

"Without that self confidence they won't go for it, " he said.

BBC: A-level plans may 'threaten uptake of tough subjects'

What emerges from her chronicle is the story of a person who never let setbacks shake her self confidence, a Southern girl who learned to be a street fighter without losing her humanity.

FORBES: Linda Hudson, First Female CEO In Defense, Reflects On What It Takes