流体 liútǐ fluid Origin Definitions Defs Strokes Stroke Words Sentences Sents 流体力学 liútǐlìxué fluid mechanics the branch of physics that studies the mechanics of fluids (liquids, gases, and plasmas) and the forces acting on them半流体 bànliútǐ semifluid 流体动力学 liútǐdònglìxué fluid dynamics 流体核试验 liútǐhéshìyàn hydronuclear explosion a hydronuclear explosion (HNE)