然而有时候一些老鼠会跑出去。

At any given time however some mice escape and run free.

youdao

然而有时候大自然的慷慨是不够的。

However, sometimes nature's bounty is not enough.

youdao

而有时候一个文科学位就足够了。

Sometimes a liberal arts degree will suffice.

youdao

and that something that happens was often very mysterious, very akin, I think, sometimes to inspiration.

而这种想法，常常是神秘的，有时候，与“灵感“很相似。

普林斯顿公开课 - 人性课程节选

and then one day I'll be like, "Oh, I want to dress like a clown today, so I will."

而可能有时候，我想，“喔，今天我想打扮成一个小丑，然后我就这么做了。”

时尚让人兴奋 - SpeakingMax英语口语达人

And resonance is the idea that sometimes one single Lewis structure does not adequately describe the electron configuration around a given molecule, so instead you need to draw two different Lewis structures to describe that more appropriately.

而所谓共振态,就是有时候一个路易斯结构不足以,完整描述一个给定分子的电子排布，因此这时你需要同时画出两个,不同的路易斯结构来描述它,这样会更恰当。

麻省理工公开课 - 化学原理课程节选