n.浮力；彈性；心情愉快

Each of the balloons has its own buoyancy. 每一個氣球有它自己的浮力。

We tested the boat for its buoyancy. 我們測試了這條船的漂浮能力。

I take up my task with buoyancy and hope. 當我挑起這個擔(dān)子的時候，我是心情愉快、滿懷希望的。

浮力驅(qū)動