China to unveil rail to Tibet

Critics worry high-tech line may harm Tibetan culture, environment

BEIJING, China (AP) -- China unveils an engineering marvel this weekend -- a railway to Tibet that features high-tech systems to stabilize tracks over permafrost and cabins enriched with oxygen to help riders cope with high altitudes.

The Qinghai-Tibet railroad is shown on the bank of the Co Nag Lake in north Tibet.

词汇：

permafrost n. [地]永久冻结带

(来源：EnglishCN.com)

marvel
n. 奇迹 v. 大为惊异, 觉得惊奇

关于西藏通火车的CNN视频报道，请点击：

http://edition.cnn.com/video/player/player.html?url=/video/world/2006/07/02/rivers.china.tibet.railway.cnn&wm=10