keystone的翻译，读音
英/ ˈkiːstəʊn /
美/ ˈkiːstoʊn /
释义：
n.基础，主旨；基本原则；楔石；拱顶石
词态
复数keystones短句
keystone species 重点物种；关键物种例句
To furnish ( an arch ) with a keystone. 用拱顶石装饰 ( 拱顶 ) 。
The second chapter is the keystone of this paper. 第二章是本文的中心。
Under the competition, service becomes the keystone. 在竞争中，业务成为了关键。
Chapter three and four are the keystone of this paper 第三章和第四章是本文的重点章节。
Chapter three and four are the keystone of this paper. 第三章和第四章是本文的重点章节。