换句话说，瑞文苏和其他进化理论家认为，在梦中，我们实际上是在演习"战斗或逃跑"反应，即使实际上腿和胳膊都没有行动。

In other words, Revonsuo and other evolutionary theorists argue that in dreams, we are actually rehearsing fight-and-flight responses, even though the legs and arms are not actually moving.

youdao

从化石上腿痕迹的位置，腹部的曲线印记，且化石中缺少翅膀的标志，研究员猜测那些痕迹是古浮游笔直的竖起一对翅膀休息时留下的。

From the position of the legs, the curve of the abdomen, and the lack of wing marks, the researchers suspect that the imprint was made by an ancient mayfly that held its wings upright when at rest.

youdao

我撞到椅子上，碰伤了腿。

I banged into a chair and hurt my leg.

《牛津词典》

Then you remember that you got shin guards down to your feet; you have this breastplate.

还记得我刚才说的腿上的护胫吗,还有胸甲

耶鲁公开课 - 古希腊历史简介课程节选

So if you have a bad heart, then a scientist can take like, cells from your leg,

所以，如果你心脏不好，科学家就可以从你的腿上提取干细胞，

关于干细胞的研究 - SpeakingMax英语口语达人