转动 zhuǎndòngzhuàndòng HSK4 to turn Origin Definitions Defs Strokes Stroke Words Sentences Sents 转动惯量 zhuǎndòngguànliàng moment of inertia moment of inertia; the measure of an object's resistance to rotational acceleration转动件 zhuàndòngjiàn rotor rotor; a rotating part of a machine or engine转动轴 zhuàndòngzhóu axis of rotation axis of rotation; spindle; axis of spin