Tiānqì yùbào de jìsuàn móxíng jiànlì zài liútǐ dònglìxué de jīchǔ shàng.
The computer models behind weather forecasts are built on fluid dynamics.
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The branch of 流体力学 (fluid mechanics) that deals with fluids in motion; fluids at rest belong to 流体静力学. The same 动力学 (dynamics) ending gives 空气动力学 (aerodynamics).