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为提高北京市园林绿化水平,在中国国际经济技术交流中心的提议与资助下,北京市园林局派出5人代表团考察了美国与联邦德国的城市绿化。自1990年4月30日至5月21日访问了美国的六个城市——西海岸的旧金山、西雅图、波特兰。中部的堪萨斯、克里福兰。
In order to improve the level of landscaping in Beijing, a delegation of 5 delegates from the Beijing Bureau of Parks and Municipalities visited the city greening of the United States and the Federal Republic of Germany with the proposal and funding of China International Center for Economic and Technical Exchanges. From April 30 to May 21, 1990, six U.S. cities were visited - San Francisco, Seattle, and Portland on the West Coast. Central Kansas, Cleveland.