One never knows what may happen.

谁也不知道可能会发生什么事。

youdao

Personally, I think that's wrong, but one never knows.

我个人认为这是错误的，但是没人会知道。

youdao

After all, one never knows, it may be something important.

毕竟，一不曾知道，它可能是重要的事物。

youdao

Every study I know of, and I suspect every one John knows, about learning, stresses that students learn best when they take notes Ironically, even if they never look at them.

我知道的所有有关于学习的研究，还有我假设John知道的那些，都证明学生在自己做笔记的时候学得更好,讽刺的是即使他们永远不看那些笔记。

麻省理工公开课 - 计算机科学及编程导论课程节选

But then again, one never knows the twists and turns that boxing can take.

WSJ: Bradley Wins Controversial Decision Over Pacquiao

One never knows when one will need that but one knows it will.

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When dealing with Simic science, one never knows whether the next experiment will turn out to be a shark frog or crocodile ooze.

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