Nature is relentless and unchangeable, and it is indifferent as to whether its hidden reasons and actions are understandable to man or not.
自然是无情的、不可改变的，它对其隐藏的原因和行为是否为人类所理解并不关心。
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Relentless
自然是无情的、不可改变的，它对其隐藏的原因和行为是否为人类所理解并不关心。