?拱形明洞
明洞open-cut tunnel;tunnel without cover;gallery 拱形明洞arch open cut tunnel;arch tunnel without cover;arch gallery 棚洞shed tunnel;shed gallery ..
英汉双解词典包含3185865条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。