The research about degenerative frozen soil for ages at the Xiaoxinganling region and frozen soil test at the Wuying - Tangwanghe section of the Yijia highway是什么意思_The research about degenerative frozen soil for ages at the Xiaoxinganling region and frozen soil test at the Wuying - Tangwanghe section of the Yijia highway在线翻译_英语_读音_用法_例句