浮力

zhèng fú lì

正浮力

positive buoyancy

chuán de fú lì

船的浮力

boat's buoyancy

kōng qì yǒu fú lì

空气有浮力。

The air is buoyant.

yán shuǐ fú lì gèng dà

盐水浮力更大。

Salt water is more buoyant.