经济学中有个重要的概念叫做埃奇沃思定律，是以弗朗西斯·伊西德罗·埃奇沃思的名字命名的。

An important concept in economics called ___Edgeworth's Law is named after Francis Ysidro ___Edgeworth.

统计学家使用Edgeworth级数来改进概率分布近似值的精确度。

Statisticians use the ___Edgeworth series to improve the accuracy of probability distribution approximations.