The boundary faults ofextensional sag are the steeper,and the detachment levels are the deeper,the source beds arethe thicker in the sag.是什么意思_The boundary faults ofextensional sag are the steeper,and the detachment levels are the deeper,the source beds arethe thicker in the sag.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句