抗渗强度与干容重呈双曲线函数关系。
The relation between piping resistance and dry density may be expressed by a hyperbolic function.
在水泵的选型或运行中，通常采用多项式的最小二乘法或根据假设的函数关系来拟合水泵性能曲线。
Least square method of polynomial or the method based on the given function are used to fit pump characteristic curve in pump selection or operation.
需求曲线——一个关联到商品数量或服务消费者愿望的与这个商品购买价格关系的函数。
Demand curve — a function that relates the quantity of a commodity or serve consumers wish to purchase to the price of that commodity.
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