在这种情况下，捕食者和被捕食者可能会在一段时间内继续这种循环模式。
In this situation, the predator and prey population may continue in this cyclical pattern for some time.
这些土地不仅没有被吞进沙漠化的漩涡中，反倒摇身一变成全了一段新生命的良性循环。
Instead of being sucked downward into the spiral of desertification, they have kick-started a new, virtuous cycle of life.
它们绝不仅仅是人类历史起伏循环中的一段短暂的坎坷。
They are not just temporary dips and blips in the up-and-down cycle of human history.
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