cornerstone
'kɔ:nәstәjn
基本解释
n. 奠基石, 基础
英文释义
n. a stone in the exterior of a large and important building; usually carved with a date and laid with appropriate ceremonies
n. a stone at the outer corner of two intersecting masonry walls
词形变化
上一个单词：corners
下一个单词：cornerstones