Exercise training and competition not only are the important contents of teaching programs in institutions of higher learning, but also are the obligatory tasks of these institutions.
运动训练与竞赛不仅是高等体育院校教学计划的重要内容，而且是高等体育院校义不容辞的责任。
Medium intensity exercise can increase the bodys resistance to infection, and the intensive training and competition can lower the bodys immunity.
中等强度运动可增加机体的抗感染能力，而大运动量训练和竞赛可降低机体的免疫力。
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