n. 练习;运动,训练;运用;
vi. 锻炼,训练,练习;
vt. 锻炼(身体某部位);使焦虑,使忧虑;实行,发挥(作用);运用;
例句:
Fresh air and exercise develop healthy bodies.
新鲜空气和运动能使身体健康.
Exercise is conducive to good health.
体育锻炼有助于增强体质.
When you walk you exercise your leg muscles.
当你走路时,你在运动腿上的肌肉. Don5