以上来源于: WordNet
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。
Because complex species interactions may be involved, identifying a keystone species by removing the species and observing changes in the ecosystem is problematic.
由于其中可能涉及复杂的物种相互作用，通过移除一个关键物种并观察生态系统的变化来确定该物种是有问题的。
It might seem that certain traits would clearly define a species as a keystone species.
似乎某些特征会清楚地将一个物种定义为关键物种。
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