是动副短语,例如:

1、Work out at a gym or swim twice a week.一周去健身房锻炼两次,或游两次泳。

2、While the lads are golfing, I work out in the gym.小伙子们打高尔夫球的时候,我在健身房锻炼。

3、Let's be practical and work out the cost first.咱们实际一点儿,先计算一下成本费用。