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.
詞匯：
permafrost
n. [地]永久凍結(jié)帶
marvel
n.奇跡v.大為驚異， 覺得驚奇
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.
詞匯：
permafrost
n. [地]永久凍結(jié)帶
marvel
n.奇跡v.大為驚異， 覺得驚奇