National economy is a discipline in the category of applied economics of a comprehensive nature.
国民经济学是综合性较强的应用经济类专业。
METHODS: the theory of price elasticity in economics was applied for the analysis.
方法：运用经济学中的弹性理论进行分析。
METHODS: the theory of price elasticity in economics was applied for the analysis.
方法：运用经济学中的弹性理论进行分析。
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