一旦某一地区对水力资源的需要量超过水利资源的供应量，人们就得为使用水利资源支付等价物。
When more water power is wanted in a particular district, than there are falls of water to supply it, persons will give an equivalent for the use of a fall of water.
在等价鞅测度框架下，讨论了在期权到期时刻具有连续红利支付的幂型股票欧式期权的定价公式。
Under the framework of equivalent martingale measures, we discuss the pricing formulas of power payoffs European options with continuous dividend at the time of maturity of the options.
现金，是指企业库存现金以及可以随时用现金， 现金于支付的存款。 现金等价物， 于支付的存款。
The term "cash" refers to cash on hand and deposits that are available for payment at any time.
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