求翻译：如果有一天我们人类克隆的一些物种在极偶然的情况下交配，然后产生了不可预知的糟糕变化，导致生物链发生变化，我想我们人类也许会面临前所未有的挑战。是什么意思？

If one day we human cloning some species mate in very occasional circumstances, then the unpredictable bad change, resulting in the food chain changes, I think that we humans may be facing an unprecedented challenge.

If there is a day we human cloning some of the species in rare circumstances, and then have the worse the unpredictable changes, resulting in changes in biological chain, and I think we humans might be facing an unprecedented challenge will be.

If some species which the one day our humanity clones in the extremely accidental situation the copulation, then has had the too bad change which cannot be known in advance, causes the biological chain to change, I thought perhaps our humanity can face the unprecedented challenge.

If one day we human cloning in very occasional circumstances some species mate, and produce unpredictable bad changes, cause the chain of change, I think we may be faced with unprecedented challenges.

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