单词
keystone
读音
ˈkiːstoʊn
美式
英式
词根
无
释义
n. 基础，主旨；基本原则；楔石；拱顶石 [ 复数 keystones ]
例句
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。
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。
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。
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。
强化记忆
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a feathered tempest.And indeed it was a keystone speciesthat enriched the entire eastern deciduous forest,
It happened to lots of mammals.Another keystone species is a famous animalcalled the European aurochs.
we interfered in a big way by making these animals go extinct,and many of them were keystone species,
This is what's planned for 2015.And you can see here the Keystone Pipeline,which would take tar sands raw down to the Gulf Coast,
They are the motors of this great human engine, driving it forward.And now we're at the keystone of the ceiling,the culmination of the whole thing,
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