气体动力学 qìtǐdònglìxué aerodynamics Origin Definitions Defs Strokes Stroke Words Sentences Sents 气体 氣體 qìtǐ noun gas gas; gaseous substance; a physical state of matter that has no fixed shape or volume动力学 動力學 dònglìxué dynamics the branch of mechanics or chemistry dealing with the motion of bodies and the effects of forces; dynamics or kinetics