英语语法分析

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。

The government's determination to beat inflation has so far been the keystone of its economic policy.

政府对通货膨胀的坚决抑制迄今为止一直是其经济政策的根本。

《柯林斯英汉双解大词典》

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。