The reason you have to get it out of your head is you need to be able to see it on a surface that is not in your mind.

这么做的原因是,你需要,客观地观察它,而不是看它在你大脑中的样子。

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The reason for that complexity is because your immune system needs to be able to respond to all the potential foreign invaders that we could encounter.

整个系统之所以如此复杂是因为,免疫系统需要应对所有,我们要面对的来犯之敌

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