There is, however, a further and even more serious objection from an experimental point of view.
但是，从实验的观点来看，还有一个更为严重的缺点。
The external conditions appear serious, but the internal factors are even more essential and complex.
外部条件看似严重，但内部因素却更加本质和复杂。
The external conditions appear serious, but the internal factors are even more essential and complex.
外部条件看似严重，但内部因素却更加本质和复杂。
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