On the basis of classifying goods, the article classifies sports service products into two kinds, which are common resources and club goods.

以物品的分类为基础，将体育服务产品分成共同资源和俱乐部产品两大类。

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Try all kinds of sports until you find one, two or even three that are right for you.

直至你找到一项，两项，或者甚至三项你觉得对你来说不错的之前，尝试所有种类的运动。

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There are two kinds of control models in sports training, one being fixed and the other changeable.

运动训练有确定性和不确定性两种训练控制模型。两种模型对运动训练实践都具有重要意义。

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