例句與造句

1. This is determined by the grains downward acting weight force being matched by a combined buoyancy and fluid drag force and can be expressed by:
2. In aerodynamics, "'aerodynamic drag "'is the fluid drag force that acts on any moving solid body in the direction of the fluid freestream flow.
3. It's difficult to find fluid drag force in a sentence. 用fluid drag force造句挺難的