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(一)在中国相当长的历史时段中,对于广大的中原地区和长江以南地区的人们来说,东北是一个辽远而神秘的概念。现在的东北,西部是茫茫无际的蒙古高原,东北部是横亘千里的大小兴安岭、长白山脉,西南部低平近海,以辽西走廓直通中原;在高大的山脉包围之中是松花江、黑龙江、乌苏
(1) For quite a long historical period in China, northeast China is a far-reaching and mysterious concept to the vast Central Plains and areas south of the Yangtze River. At present, the northeast and the west are the vast Mongolian plateau. In the northeast, the Xinganling Mountains, the Changbai Mountains and the low seas near the southwest reach the Central Plains with the profile of Liaoxi going straight. Among the tall mountains are the Songhua River, Heilongjiang, Wusu