You're an hour late—what kept you?

你晚了一小时—什么事把你给耽误了？

《牛津词典》

What kept you away yesterday?

昨天你为什么没有来？

youdao

You're late; what kept you?

你迟到了，什么事使你耽搁了？

youdao

So that should mean that the energy that's transferred to the electron should be greater, but that's not what you saw at all, and what you saw is that if you kept the frequency constant there was absolutely no change in the kinetic energy of the electrons, no matter how high up you had the intensity of the light go.

所以这意味着转移到电子,上的能量也越大，但这并不是，我们观测到的现象,我们所看到的是,如果固定光的频率不变,不管光强如何变化,电子的动能没有任何变化。

麻省理工公开课 - 化学原理课程节选

And you'll say, "What?" I mean, they've kept this from you. You look at them and say,

你说，“天哪！”原来他们一直瞒着你。你看着他们说，

How long课堂 - SpeakingMax英语口语达人

But what if you kept your position until now?

FORBES: Should you Buy, Sell, or Stay way in this Market Correction?

This being a Google product, there's also a search function, so you can find the Keeps you kept, and you can color code what you've got in a variety of hues.

CNN: Meet Keep, Google's answer to Evernote

What do you think has kept our people safe?

NPR: Harris Faces Tough Fight in Florida Primary