There are no loops here, which might be because the graphic is a simplification.
这里没有一个循环，可能是因为图是一个简化而已。
There is no doubt that this is an extreme simplification of the biological facts.
毫无疑问，这是一个极其简化的生物学事实。
There is no doubt that this is an extreme simplification of the biological facts.
毫无疑问，这是一个极其简化的生物学事实。
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