n.运动；练习；作业vt.运用vi.锻炼形容词：exercisable过去式：exercised过去分词：exercised现在分词：exercising......
n. 运动；练习；作业vt.运用vi.锻炼 形容词：exercisable过去式：exercised过去分词：exercised现在分词：exercisi......
