The Montgolfier brothers began experimenting by filling small paper bags with smoke.
蒙戈尔菲耶兄弟俩最验是把烟装进小纸袋。
The Montgolfier brothers began experimenting by filling small paper bags with smoke.
蒙戈尔菲耶兄弟俩最验是把烟装进小纸袋。
Nevertheless, the flight was a success, and, just as Joseph Montgolfier had envisioned, balloons became useful for military purposes.
然而,试验飞是成功,而且,正如约瑟夫菲尔设,成为有用用于军事目。
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