In view of the brittleness of the surrounding rocks of underground roadways, it is best that the contour of roadways takes the shape of a pressure curve.是什么意思_In view of the brittleness of the surrounding rocks of underground roadways, it is best that the contour of roadways takes the shape of a pressure curve.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句