Deviant behaviour is one of the features of certain types of mental illness.

反常举动是某些精神疾病的特征之一。

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Without adequate data on the nature and extent of the problem it is difficult to formulate a policy to foster a culture of integrity that limits and discourages deviant behaviour.

由于没有充分的数据资料来证实这种问题的本质和严重程度，因此就很难制定一种策略来树立学术诚信、限制和阻止不轨行为。

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Therefore , school , family and related social institutions should take efficient measures to prevent teenagers' deviant behaviour, and build a healthy social environment for them.

因此 ，学校、家庭和有关部门要采取有力措施 ，预防和抑制青少年偏差行为 ，为青少年健康成长创造良好的社会环境。

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Therefore , school , family and related social institutions should take efficient measures to prevent teenagers' deviant behaviour, and build a healthy social environment for them.

因此 ，学校、家庭和有关部门要采取有力措施 ，预防和抑制青少年偏差行为 ，为青少年健康成长创造良好的社会环境。

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