送交者: laotan 于 2011-01-02, 14:17:33:
回答: Why the Human Body Temperature Is 37°C 由 蟑脑丸 于 2011-01-02, 13:44:19:
To develop, they need a temperature of about 3-5 degrees (Fahrenheit) below the rest of the body. That is why the testicles hang (in the scrotum) outside the body.