difference in difference

基本解释

There were no gender-difference in quality of life too, but the konwledge-difference appered in the life condition ;
生活质量中的四个维度也不存在性别差异，但在物质生活状态维度上存在显著的文化程度的差异；
Micro-difference blasting in deep hole is carried out in excavation of diversion tunnel at Dahekou hydropower station.
大河口水电站将深孔微差爆破运用于导流隧洞开挖。
Province-Managing-County Reform; Fiscal Self-Supporting; Mitigation of Fiscal Deficiencies; Panel Data; Difference-in-Difference Estimation;
省直管县；财政自给能力；财政解困；面板数据；倍差法估计；

She says people would not even notice a difference in taste with three grams, or one-half teaspoon, less salt per day.
It's really the difference between perseverance in my case, and genius-- pure, unadulterated genius-- in the case of Chopin.
这真是差距,勤奋的普通人,比如我,和天才,浑然天成的天才,比如肖邦,之间的差距
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You see the difference in electronegativity, square it, multiply it by one-quarter and raise that to the power e.
你看到了电负性的差异，开方，乘以四分之一,在移到e上去做指数。
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Yet, a difference that small cannot account for a three- to four-fold difference in cancer screening rates.
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