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单词
China space activities
释义
China space activities
Encyclopedia
工学
﹝各国航天﹞
释
China space activities
中国航天
中国是世界上第五个独立研制并发射人造地球卫星的国家。中国航天活动领域广泛,处于世界航天大国行列。1970年4月24日,中国研制的长征一号运载火箭成功发射了中国第一颗人造地球卫星“东方红一号”。截至2018年年底,中国共成功实施313次航天发射,发射航天器499个,其中在轨运行航天器282个(只包含中国发射的所有权归中国的航天器,下文同)。
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sequence of arcs
sequence of a triple
sequence of automata
sequence of complex numbers
sequence of derived functors
sequence of distinct points
sequence of edges
sequence of events
sequence of event system
sequence of factor groups
sequence of force strength
sequence of functions
sequence of giants
sequence of groups
sequence of independent events
sequence of intersecting lines
sequence of iterations
sequence of lattices
sequence of levels
sequence of likelihood ratios
sequence of mappings
sequence of natural numbers
sequence of numbers
sequence of partial sums
sequence of points
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