(接上期)我们可以用自己的汗做一个有趣的试验,你肯定就会理解出汗的意义了。到了夏天,你穿厚衣服去跑步,你的衣服肯定会被汗水打湿,别洗!把它装在塑料袋子中裹得严严的,封好袋口挂在太阳下暴晒三天。你再打开袋子口会发现什么?大概你的第一感觉就是:“这衣服馊了! (Continued) We can do an interesting experiment with our sweat, and you will certainly understand the meaning of sweating. In the summer, you wear thick clothes to run, your clothes will certainly be sweat wet, do not wash! Put it in a plastic bag wrapped tightly, sealed bag mouth hung in the sun for three days. What would you find by opening the mouth of the bag again? Perhaps your first feeling is: ”This dress is out!