1. He has always been very keen on doing physical exercises. 他锻炼身体一向很积极。
2. People not only keep fit or keep a good shape through doing more physical exercises, but also through making friends who have the similar interests. 人们不但可以通过加强锻炼，而且能够通过结交志同道合的朋友来保持健康和维持身材。
3. Physical exercises develop muscle. 运动强健肌肉。
4. Do you often do physical exercises? 是，我经常做体育运动。
5. Others turn to intensive physical exercises for help. 其他人求助于加强体育锻炼。
