对不起,楼主,我想你应该打错了一个字母了,“hirdle rate”应该真正写法是这个 －－ “hurdle rate”.它有如下解释,希望对你有用：
hurdle rate 最低可接受费率
Hurdle rate 要求报酬率
Hurdle Rate 预设回报率
multiple hurdle rate:多重最低期望收益率
Hurdle Rate of Return:最低投资回报率
eg.
1.Hurdle rate:In discounted cashflow analysis,the rate of return below which an investment is not worth making.Used more with capital expenditure than securities investments.
投资)最低回报率要求,最低预期回报率:现金流贴现分析中指投资值得考虑的最低回报率,更多用于资本支出而不是证券投资.
2.We shall see that it is the right hurdle rate for those projects that have the same risk as the firm's existing business; however,if a project is more risky than the firm as a whole,the cost of capital needs to be adjusted upward and the project's cash flows discounted at this higher rate.
我们应看出它（指公司资本成本）对那些与企业现有业务有相同风险的项目来说是正确的贴现率；然而,如果一个项目较企业整体更有风险,资本成本就需要向上调整（即增加）,而项目的现金流就以这个更高的比率来贴现.
