我想这是他们家，但不敢肯定。

I think this is their house, but I'm not sure.

《牛津词典》

他也许有线索可以找到他们，但不敢在电话里谈。

He's got an idea of where, but he's scared to talk on the phone.

youdao

这里在发烧，我常有一种感觉，但不敢给它定个名堂。

There's a burning fever here, and something now and then to which I fear to give a name.

youdao

Is the reason people behave badly-- I don't know "Badly"--people choose Alpha in this game here, is it the fact that they can't communicate?

人们之所以取得糟糕的结果,我不敢说结果是不是真的不好,但人们选α是因为不能交流吗

耶鲁公开课 - 博弈论课程节选

I take chances no one else will--great driver," but above and beyond that there does seem to be a psychological effect manifested here and manifested elsewhere, which is a motivation to feel good about yourself.

我敢冒别人不敢冒的险，我是个好司机“,但除此以外,但似乎存在着一个心理原因存在于这个效应,和另外的效应中，那就是自我感觉良好的动机。

耶鲁公开课 - 心理学导论课程节选