[treated as sing.]the branch of mechanics concerned with the motion of bodies under the action of forces 动力学。 比较 statics ■[usu. with modifier]the branch of any science in which forces or changes are considered 力学 chemical dynamics. 化学动态学。
the forces or properties which stimulate growth, development, or change within a system or process 动力 the dynamics of changing social relations. 改变社会关系的动力。
(Music)the varying levels of volume of sound in different parts of a musical performance (乐)力度,力度变化