介绍了泵业企业长期投资决策中最常用的净现值法和内部收益率法这两种决策方法。

The thesis introduces the net present value method and the internal rate of return method which are most commonly used in the long term investment of pump enterprises.

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本章在研究了风险投资的含义和基本特点的基础上，介绍了传统的投资决策方法即净现值法和内部收益率法的基本原理。

This chapter introduced traditional investment decision method, such as net present value and inters return rate on the base of function and character about venture capital.

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文章继而对这两种常用决策方法进行比较分析，发现内部收益率法至少有三大缺陷，即它有一个不适当的机会成本假设；

Then the thesis compares and analyses the two common methods, and finds out least three defects in internal rate of return method: it has an improper opportunity cost hypothesis;

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文章继而对这两种常用决策方法进行比较分析，发现内部收益率法至少有三大缺陷，即它有一个不适当的机会成本假设；

Then the thesis compares and analyses the two common methods, and finds out least three defects in internal rate of return method: it has an improper opportunity cost hypothesis;

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