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 ;
生活質量中的四個維度也不存在性別差異，但在物質生活狀態維度上存在顯著的文化程度的差異；
Micro-difference blasting in deep hole is carried out in excavation of diversion tunnel at Dahekou hydropower station.
大河口水電站將深孔微差爆破運用於導流隧洞開挖。
Province-Managing-County Reform; Fiscal Self-Supporting; Mitigation of Fiscal Deficiencies; Panel Data; Difference-in-Difference Estimation;
省直琯縣；財政自給能力；財政解睏；麪板數據；倍差法估計；

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.
這真是差距,勤奮的普通人,比如我,和天才,渾然天成的天才,比如肖邦,之間的差距
耶魯公開課 - 聆聽音樂課程節選
You see the difference in electronegativity, square it, multiply it by one-quarter and raise that to the power e.
你看到了電負性的差異，開方，乘以四分之一,在移到e上去做指數。
麻省理工公開課 - 固態化學導論課程節選

Yet, a difference that small cannot account for a three- to four-fold difference in cancer screening rates.
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