The Montgolfier brothers began experimenting by filling small paper bags with smoke.
蒙戈
菲耶兄弟俩最初的
把烟装进小纸袋。
费(姓氏)The Montgolfier brothers began experimenting by filling small paper bags with smoke.
蒙戈菲耶兄弟俩最初的把烟装进小纸袋。
Nevertheless, the flight was a success, and, just as Joseph Montgolfier had envisioned, balloons became useful for military purposes.
然而，试飞
成功的，而且，正如约瑟夫菲
，气球成为有用的用于军事目的。
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