n the activity of exerting your muscles in various ways to keep fit
v put to use
v carry out or practice; as of jobs and professions
v give a workout to
v do physical exercise
v learn by repetition
v. 锻炼, 训练, 练习( exercise的现在分词 ); 锻炼（身体某部位）; 使焦虑; 发挥（作用）