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今年夏天我应邀赴美国考察访问,先后到达华盛顿、纽约、芝加哥、圣路易斯、博兹曼、圣德菲、洛杉矶等七个城市。这些城市分布在美国东南西北各个地区,由于时间匆促,安排的行程也很紧凑,只能得到一个很粗略的印象,这里仅就与本人专业有关的方面谈谈观感。
This summer I was invited to study in the United States and visited seven cities in Washington, New York, Chicago, St. Louis, Bozeman, St Deere and Los Angeles. These cities are located in various areas in the southeast, northwest and northwest of the United States. Due to the time constraints and the tight schedule of the trips, only a very sketchy impression can be drawn. Only the views related to my major are discussed here.