这一项目的总工程师姚志军说： ：“这是中国铁路总公司有史以来修建难度最高的隧道。”
"It has been the most difficult tunnel that China Railway ever built, " said Yao Zhijun, chief engineer of the project.
这一项目的总工程师姚志军说： ：“这是中国铁路总公司有史以来修建难度最高的隧道。”
"It has been the most difficult tunnel that China Railway ever built, " said Yao Zhijun, chief engineer of the project.
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