Balloons & Buoyancy 气球和浮力
Aircraft use lift from their wings to stay aloft, while submarines operate like underwater balloons, adjusting their buoyancy to sink or rise.
飞行器利用机翼上下两面的压力差形成提升力以平稳的在空中飞行，而潜艇在原理上形同海下的热气球，通过调节自身浮力或升或降。
Each of the balloons has its own buoyancy.
每一个气球有它自己的浮力。
At present, there are two kinds of weather balloons hydrogen charging instruments-one is buoyancy balance, and the other equalizer.
目前气象气球充氢设备主要有浮力天平和平衡器两种。
应用推荐