英语语法分析

As lower Yangtze is the continental edge-extending area controlled by asthenolith through a long time of the research on geology of the depth, lower Yangtze area has general background of earthquake.

长期的深部地质研究证实，下扬子地区属软流圈软流控制下的陆缘伸展区，因而具有普遍的面积性地震背景。