首先阐明需求弹性的基本概念，并分析了弹性和低弹性、单位弹性与总收益的关系。
The paper expounds the basic concept of demand elasticity at first and analyzes the relation between the high elasticity and the low one, the unit elasticity and gross earning.
在假定水不可压缩的情况下，利用已有的相关公式推导了单位弹性释水系数与土层压缩模量、变形模量之间的关系。
Given the incompressibility of water, a relation between specific elastic storage, compressibility modulus and deformation modulus was inferred by applying current related formulas.
通常，s(p)表示单位价格p变动时供给量的变动，而供给弹性表示为h（来自古希腊字幕的第七个，因为第五个已经被选）。
Formally, if s(p)gives the quantity supplied for each price p, the elasticity of supply, denoted h (the Greek letter “eta”, chosen because epsilon was already taken) is
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