英语词汇keystone怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	keystone
释义	key·stone /ˈkiːstəʊn/ n. 1. 【建】拱顶石；塞缝石 2. 基础；主旨；基本原则 the keystone of sb.'s faith 某人信仰的基础 The keystone of their foreign policy is friendliness to all nations. 他们外交政策的基本原则是和所有国家都友好相处。
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