Many a time has the girl changed her answers in the test paper because she is not confident enough of herself especially when it comes to a critical moment.

这个女孩已经多次改动了试卷上的答案，因为她不够自信，尤其是在关键时刻。

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Firstly, I am not confident enough.

首先，我不够自信。

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And yet they are still not confident enough to speak.

但他们还是不能自信的张口说外语。

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"I believe women are not confident enough in my country to speak up.

VOA: special.2010.06.24

He said the reward was offered for details received anonymously if people were "not confident enough to speak to me directly".

BBC: Kevin Lavelle

Discount store shoppers, also known as the vast majority of Americans, are either still suffering economically or not confident enough to start spending.

FORBES: Retailers and The Recovery, Why The Recession's Not Over Yet

Sir Mervyn King told the Treasury Committee the Bank of England is "not confident" enough in ratings agencies to trust their judgments.

BBC: UK credit rating 'on the edge'