Due to the sudden change of the geological conditions,collapse occurs to the exit section of Nama tunnel,which is an integral part of Qian-Gui railway capacity-expansion and reconstruction works.是什么意思_Due to the sudden change of the geological conditions,collapse occurs to the exit section of Nama tunnel,which is an integral part of Qian-Gui railway capacity-expansion and reconstruction works.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句