When snorkeling, do not touch the coral or stir up sediment, as these actions can damage the reef's fragile ecosystem.

潜泳的时候，不要碰珊瑚礁或者搅动沉淀物，因为这样做可能会破坏珊瑚脆弱的生态系统。

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We will never be able to see or study this fragile ecosystem.

我们将永远无法看到或学习这个脆弱的生态系统。

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Will these alien genes harm the fragile ecosystem upon which we all depend?

这些异种基因会不会破坏我们赖以生存的、脆弱的生态系统？

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The crew is also acutely aware of their place in this fragile ecosystem.

BBC: Safari by water in southern Africa

We took breaks to marvel at the fragile ecosystem, Kelly moving fluidly between his roles as stuntman and coastal biology professor.

BBC: An extreme way to see Wales' coast

The court, the highest in the land, rejected an appeal by environmentalist groups who fear it will damage Patagonia's fragile ecosystem.

BBC: Chile court rules in favour of Patagonia HidroAysen dam