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.
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.
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