为维持平衡，生态系统“顶点”的大鱼可能和小鱼一样重要。

To maintain a balance, big "apex" fish may be as important as the small one.

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植物平衡了生态系统、保护了流域、减缓了侵蚀、缓和了气候，为许多动物物种提供了庇护所。

Plant life balances ecosystems, protects watersheds, mitigates erosion, moderates climate and provides shelter for many animal species.

youdao

随着美洲虎的消失，生态系统失去了平衡。

With the jaguars gone, the ecosystem was out of balance.

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