中国开始建设世界最高公路隧道——将横贯四川省西南部雀儿山的隧道工程周三开工建设。

China a begins construction of world's highest highway tunnel — construction of a tunnel that will traverse Trola Mountain in southwestern Sichuan Province began on Wednesday.

翻越雀儿山历来川藏线都是最为传奇险峻的，五月初进藏显然不是最好的时间，很多高寒地带还在下雪。

Across Lentigo mountain The route of Sichuan-Tibet is always the most dangerous and it is obviously not the best time to go to Tibet in May when some higher and colder places are still snowing.