Euphemism literally raised these professional level, and also reflects low class people by the social recognition and respect to the psychological.

委婉语从字面上提高了这些职业的级别，同时也反映了低阶层人们力求受到社会承认与尊重的心理。

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They are of low class and high authority. They are important forces to keep social stability and to promote institution evolution.

他们级别低，权利大，是维持社会稳定的重要力量，是制度变迁的推动者。

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Prevalence of low economic and social class and economic class of the high ratio of 9:1. The low economic level of the highest prevalence levels.

患病率在低经济社会阶层与高经济阶层之比为9：1。以低经济水平阶层的患病率最高。

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Prevalence of low economic and social class and economic class of the high ratio of 9:1. The low economic level of the highest prevalence levels.

患病率在低经济社会阶层与高经济阶层之比为9：1。以低经济水平阶层的患病率最高。

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