求翻译：适者生存，优胜劣汰，这是永恒不变的自然生存法则。是什么意思？

Survival of the fittest, survival of the fittest, which is the eternal natural rules of survival.

Survival of the fittest, and there is the survival of the fittest, and this is immutable natural law of survival.

Survival of the fittest, superior win and the inferior wash out, this is the eternal invariable nature survival principle.

The fittest of the fittest, this is the eternal nature of the rule.

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