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像鸟儿那样自由自在地翱翔,是人类由来已久的心愿。严格地说,飞机只是部分实现了人们的心愿。荷兰海姆博士说:“我们能令所有的东西,包括薄饼、
Soaring freely like a bird is a long-cherished wish of mankind. Strictly speaking, the plane only partially achieved the aspiration of the people. Dutch Heim Dr. said: "We can make all things, including pancakes,