Self-doubt is that feeling of uncertainty about your ability to accomplish something.

自我怀疑就是我们对自己完成一项事务的能力感到不确定的一种感受。

youdao

There is no doubt that optimism is a powerful combination of thinking and feeling that shifts us to a higher level of functioning.

毫无疑问，乐观是一种思考与情感强有力的结合，将我们推向更高层次的能力运作。

youdao

That hurts my pride, Watson. It is a petty feeling, no doubt, but it hurts my pride.

那伤到了我的自尊，华生。这种想法，毫无疑问，很狭隘，但他的确伤到了我的自尊。

youdao

But what should not be in doubt is Mr Blair's strength of feeling on the subject, nor its centrality to his politics.

ECONOMIST: Bagehot

You get the feeling that for Newt self-doubt is when he thinks he may have only been savagely brilliant rather than furious genius made flesh.

BBC: Newt Gingrich and his campaign legacy

No doubt Mr Abbas, who is part of that generation of Arab leaders now feeling the heat of frustration across the region, hopes that he can seize the initiative, gaining popular support in the process.

BBC: What does Abbas hope to achieve with UN state bid?