montgolfier

The Montgolfier brothers began experimenting by filling small paper bags with smoke.

蒙戈尔菲耶兄弟俩最初的实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，试验飞是成功的，而且，正如约瑟夫菲尔设想，气球成为有用的用于军事目的。