如果总成本大于总效益和NPV变成负值，那么IRR和BCR可能将会降低到

如果总成本大于总效益和NPV变成负值，那么IRR和BCR可能将会降低到零一下。这就意味着这个项目不可行。
如果总效益远远大于总成本和NPV变的更大，那么IRR和BCR可能会超过原先的假设，这就意味着这个项目可以带来更多的效益。

結果 (英文) 1:

If the total cost is greater than the total benefits and NPV turns negative, then under the BCR and IRR likely will be reduced to zero. This means that the project is not feasible.If total benefits far outweigh the greater total cost and NPV, BCR and IRR may exceed the original assumption, that means that this project would bring more benefits.

結果 (英文) 2:

If the total cost is greater than the total benefits and NPV becomes negative, the IRR and BCR will probably be reduced to about zero. This means that the project is not feasible.
If the total benefits far outweigh the total costs and NPV becomes greater, then the IRR and BCR may exceed the original assumptions, which means that this project can bring more benefits.

結果 (英文) 3:

If the total cost is greater than the total efficiency and NPV becomes negative, then IRR and BCR may be reduced to zero or one. This means that the project is not feasible.If the overall benefit is far greater than the total cost and NPV becomes larger, then the IRR and BCR may be more than the original assumption, which means that the project can bring more benefits.