作用力 zuòyònglì action force Origin Definitions Defs Strokes Stroke Words Sentences Sents 反作用力 fǎnzuòyònglì reaction force (physics) reaction force弱作用力 ruòzuòyònglì weak force the weak force (in particle physics)强作用力 qiángzuòyònglì strong force the strong force (in nuclear physics)