| 释义 |
keystone['ki:stəun]n. 拱顶石, 楔石, 重点 keystone key.stone AHD: [k¶“st½n”] D.J. [6ki87st*&n]K.K. [6ki7ston]n.（名词）1. Architecture The central wedge-shaped stone of an arch that locks its parts together.Also called headstone 【建筑学】 拱顶石，塞缝石：拱的中部楔形石头，使拱的各个部分连在一起也作 headstone2. The central supporting element of a whole.基础、主旨：整体的一个中心基本原则 |