manned balloon 有人驾驶的气球; 载人气球...
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manned balloon 有人驾驶的气球; 载人气球..
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manned balloon flight 载人气球飞行
manned balloon detail 载人气球
·2,447,543篇论文数据，部分数据来源于NoteExpress
His article for National Geographic details the challenges he undertook to achieve the longest manned balloon flight.
他为国家地理杂志撰写的文章。详细披露此次历史上飞行时间最长的载人气球遇到的种种艰难险阻。
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