人类可以在摔倒前保持一、两秒钟。

We are always a second or two from falling down.

youdao

她曾26次打破世界纪录、本赛季前保持6年不败。

She had broken the world record for 26 times, and kept be the winner before this season.

youdao

女性的则在绝经期前保持较低水平，之后升至同男性相当。

In women, cholesterol levels stay fairly low until menopause, after which they rise to about the same level as in men.

youdao

What makes the law surprising is that if I only gave you half the law, namely every body will remain at rest if it's not acted upon by a force, you will say, "That's fine. I accept that, because here's something, you leave it there, it doesn't move.

这条定律妙就妙在,如果只看定律的前半段,即,如果物体不受外力作用,将保持静止状态,你肯定会觉得,"这没什么,我能理解,因为你把一个物体放在那里,自己肯定不会动

耶鲁公开课 - 基础物理课程节选