就算在科学发达的今天，人类的身体好像仍然隐藏着很多令人惊奇的秘密。
It seems that, even today, the human body may be harbouring a few surprises.
这绝对不是一个秘密：身体上和精神上的双重积极是多么重要。
The importance of being physically and mentally active is no secret.
首先，健康是幸福的秘密(幸福的关键)。唯有身体强壮的人才能享受人生的乐趣。
First, health is the secret of happiness (the key to happiness). Only a strong man can enjoy the pleasure of life.
这就是身体健康的元秘密。
这就是身体健康的元秘密。
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