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.
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The inventors were Joseph and Jacques Montgolfier.
这两个发明家是蒙戈尔菲耶家的约瑟夫和雅克.
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