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。

youdao

It had been assumed that the ice extended westward from the Alaskan/Canadian mountains to the very edge of the continental shelf, the flat, submerged part of the continent that extends into the ocean.

人们过去曾猜测，冰山从阿拉斯加和加拿大山脉向西延伸到大陆架的最边缘，也就是大陆架扁平的、延伸到海洋中的水下大陆那部分。

youdao

Lobsters live on rocky, sandy, or muddy bottoms from the shoreline to beyond the edge of the continental shelf.

龙虾生活在大陆架边缘海岸处的岩石，沙土，或泥底。

youdao

Although there is no official IOC continental rotation policy, correspondents say the Americas may have an edge as previous games will have been held in Asia, Europe, and Australasia.

BBC: Obama to woo IOC over Chicago bid