keystones是什么意思

keystones

柯林斯高阶英汉双解学习词典释义

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拱顶石

A keystone is a stone at the top of an arch, which keeps the other stones in place by its weight and position.
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（政策、体系或进程的）基础，主旨

A keystone of a policy, system, or process is an important part of it, which is the basis for later developments.
例句
Keeping inflation low is the keystone of their economic policy. 将通货膨胀率保持在较低水平是他们经济政策的主旨。

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