A defensive fortification about 59 km (37 miles) long, built (c.140 AD) across the narrowest part of southern Scotland between the Firth of Forth and the Firth of Clyde. It was intended to mark the frontier of the Roman province of Britain.
英语词典包含464360条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。