Resarch into Application of Thermal Insulation Material for Subgrade in Perennially Frozen Soil Zone at Qinghai-Xicang Railway on Plateau是什么意思_Resarch into Application of Thermal Insulation Material for Subgrade in Perennially Frozen Soil Zone at Qinghai-Xicang Railway on Plateau在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句