网站首页 汉语 德语 英语
A horizontal tunnel excavated alongside or through gold-bearing rock.
Mid 19th century; earliest use found in Robert Brough Smyth (1830–1889), civil servant and mining engineer.
礼仪网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。