At last, The paper analyzes the calculation of the shallow cover load part, and states the mechanic concept of rock dynamic properties of the NATM.是什么意思_At last, The paper analyzes the calculation of the shallow cover load part, and states the mechanic concept of rock dynamic properties of the NATM.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句