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从银川到昆明,沿着东经107°的一条线把中国大陆分成东部和西部.这并不是人为的行政区划,而是一条地质构造线.由国家地震局编制出版的《中国岩石圈动力学图集》向人们清楚地展示了这一现象.
From Yinchuan to Kunming, the mainland of China is divided into east and west along a line of 107 ° east longitude, which is not a man-made administrative division but a geological structure line. The “Chinese lithospheric dynamics diagram compiled by the State Seismological Bureau Set ”to show people clearly this phenomenon.