网站首页 词典首页
A mark made on a component part of a structure to indicate the position it is designed to occupy.
1920s.
春雷网英语在线翻译词典收录了464360条英语词汇在线翻译词条，基本涵盖了全部常用英语词汇的中英文双语翻译及用法，是英语学习的有利工具。