The modern family structure has undertaken changes with the progress of the society.

随着社会进步，现代家庭结构发生变化，体育在家庭中的作用越来越重要。

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The performances of the change in reproductive behaviour are the number of births, fertility preferences and other aspects , which will surely lead to changes in the structure of the family.

生育行为的变化则外化为生育数量、生育偏好等方面的转变，转变的结果是家庭结构的变化。

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Inviormnents, including school and social environment 4. Family, changes and function deficiency 'of family structure have great effect on classroom misbehaviors.

环境因素，包括学校环境和社会环境；4、家庭因素，主要有家庭结构的变化和家庭教育功能的欠缺。

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