Swimming is great exercise because it USES both large muscle groups (arms and legs).

游泳是极好的运动，因为游泳同时运用到了胳膊和腿的大肌肉群。

youdao

Swimming is great exercise because it USES both large muscle groups (arms and legs).

游泳是极好的运动，因为游泳同时运用到了胳膊和腿的大肌肉群。

youdao