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人类最大的理想莫过于太空翱翔,世界上第1个试图借助外力上天的“宇航员”就出现在中国。相传在14世纪末期的明朝有位复姓“万户”的人,梦寐以求上太空翱翔。一天、他找来两只大风筝,1把特制的椅子和47枚当时最大的火箭,把火箭绑到椅子上以后,手持大风筝,让人把他固定在椅子上,点火后借火箭的推力和风筝的升力实现“登天”的理想。可是,他忽略了升空后如何返回地面这一重要环节,结果,勇
The greatest ideal of mankind is to fly in space. The first “astronaut” in the world who tried to use the external force to heaven appeared in China. According to legend, in the late 14th century, there was a Ming dialect “people” in the Ming Dynasty, dreaming of flying in space. One day he got two big kites, one specially made chair and the 47 largest rocket at that time. After fixing the rocket to a chair, he held a large kite and fixed him in a chair. After ignition, he pushed by a rocket And kite lift to achieve “ideal”. However, he ignored the important part of how to return to the ground after the lift-off. As a result, Yong