Modern society is not the big fish eat small fishs, but fast fish eat slow fishs.

现代社会已不是大鱼吃小鱼的年代，而是快鱼吃慢鱼的年代。

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The fishs' melatonin levels were unchanged, but the ability of melatonin to affect the brain was blocked.

斑马鱼褪黑素分泌量没改变，但是褪黑素不能影响不了大脑。

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The fishs' melatonin levels were unchanged, but the ability of melatonin to affect the brain was blocked.

斑马鱼褪黑素分泌量没改变，但是褪黑素不能影响不了大脑。

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