在原始人的时代，男人是猎手，要依赖蛋白质来长肌肉，并把肉类看作是战利品。而女人则负责采集水果和蔬菜。

As cavemen, he suggests, men were hunters, relying on protein to build muscles, and seeing meat as a reward, while women were gatherers of fruit and vegetables.

youdao

时代。当你变老，你的肌肉自然会减弱。

Age. As you get older, your muscles naturally become weaker.

youdao

时代。当你变老，你的肌肉自然会减弱。

Age. As you get older, your muscles naturally become weaker.

youdao