参加体育锻炼的比例比全国低。

To participate in physical activity less than the national percentage.

参加体育锻炼。

Participate in physical activity.

体育方面：积极参加体育锻炼，体育成绩优良，体质素质优秀，身体健康。

Sports: An active part in physical exercise, PE is fine grade, outstanding physical quality, in good health.

如果参加体育锻炼，你就较少需要节食。

Take a walk. If you exercise, you can diet less.

为了保持健康，我们经常参加体育锻炼。

To keep fit, we often take part in physical exercise.

参加体育锻炼的原因和动机上无明显差异；

There is no clear difference in sports motive and the reason to take part in exercise;

学生应多参加体育锻炼，使自己的身体强健。

The students should do more exercise and make themselves strong.

不管赞成还是反对, 参加体育锻炼有益于健康.

Pro or con, commitment to physical exercise is valuable to your health.

研究生参加体育锻炼的次数少且时间得不到保证；

The amount of time for their physical exercise is very little and the time can't be guaranteed.

应该鼓励学生参加体育锻炼，因为锻炼不仅有益于他们的身体，还有益于他们的心智。

Students should be encouraged to participate in physical activities, for they are beneficial not only to their bodies but also to their minds.