英吉利海峡隧道 英文介绍 英吉利海峡隧道 英文介绍 ,不要新概念2 64课的课文

The Channel Tunnel (French:le tunnel sous la Manche),also known as Chunnel or Eurotunnel is a 50.450 km (31.35 mi) long rail tunnel beneath the English Channel at the Strait of Dover,connecting Folkestone,Kent in England ( [show location on an interactive map] 51°5′49.5〃N 1°9′21〃E / 51.097083,1.15583 (Folkestone end of tunnel)) to Coquelles near Calais in northern France ( [show location on an interactive map] 50°55′22〃N 1°46′50.16〃E / 50.92278,1.7806 (Coquelles end of tunnel)).The "tunnel" consists of three separate tunnels; two 7.6m diameter single track,single direction rail tunnels which are 30m apart and one 4.8m diameter service tunnel between them.[1]
It was a megaproject with several false starts,but it was finally completed in 1994.It is the second-longest rail tunnel in the world,with the Seikan Tunnel in Japan being longer,but the undersea section of the Channel Tunnel,at 37.9 km (23.55 mi),is the longest undersea tunnel in the world.The American Society of Civil Engineers has declared the tunnel to be one of the Seven Wonders of the Modern World.