·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。
youdao
应用推荐
模块上移
模块下移
不移动