montgolfier造句

• The montgolfier brothers launched the first passenger balloon in france in 1783
  孟高尔费兄弟于1783年在法国将第一个载客汽球送上天空。
• " experimental attempts may have begun by 1709 , but not until 1783 did j . - m . and j . - . montgolfier develop a fabric - bag balloon that would rise when filled with hot air .
  1709年人类开始作实验性的尝试，但一直至1783年法国蒙戈尔费埃兄弟才发展出一种纤维织物袋气球，其在充满热空气后即可浮升。