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The physiologist who succeeds in penetrating deeper and deeper into the digestive canal becomes convinced that it consists of a number of chemical laboratories equipped with various mechanical devices.

生理学家如果能成功地把消化道越穿越深,就会相信它是由许多装有各种机械装置的化学实验室组成的。

— Ivan Petrovich Pavlov 巴甫洛夫

A LITTLE ENCOURAGEMENT

给此刻的你,一点向前的力量。

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