A municipal borough of southeast England on the Strait of Dover opposite Calais, France. Site of a Roman lighthouse, it has been a strategic port since medieval times. The chalk cliffs rising above the city have caves and tunnels originally used by smuggl
多佛尔与法国加莱市隔岸相对的英格兰东南部自治市，临多佛尔海峡。罗马灯塔遗址，自中世纪以来就是战略要地，该市白垩崖多岩洞和涵洞原为走私者所用。人口33，700
The prisoners had escaped by tunnelling.
犯人挖地道逃跑了.
tunnelling under the English Channel is a big proposition.
在英吉利海峡海底凿隧道是一个大问题。
