That's what a keystone species does in an ecosystem.

那就是拱顶石物种在生态系统中的作用。

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Context and problems: you are in an ecosystem with service consumers that rely on you for services.

环境和问题：您与依赖您提供服务的服务使用者处于一个生态系统中。

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It's like biology: in an ecosystem where microbes are promiscuously swapping genes and traits, evolution speeds up.

就像生物学：一个一群微生物混杂地交换基因和特性的生态系统，进化加速了。

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In an ecosystem of continually nurturing youth talent, clubs identify and mentor younger players.

FORBES: "The Four Goals": A New Soccer Plan For China

And we congratulate ourselves for preserving nature's beauty in an ecosystem that, beneath its shimmering emerald surface, reflects our own ugly ability to destroy.

NPR: Excerpt: 'Inventing Niagara'

The Schreck family -- Scott, Carrie and their three young boys -- spent a night in the swampy wilderness Thursday in an ecosystem home to alligators, snakes and mosquitoes.

CNN: Family safe after Everglades adventure