我们应该慎重选择这个 要求回报率 以此确保充分考虑这个项目的风险。

Some attention should be given to choosing the required rate of return to make sure that it adequately accounts for the risk of the project.

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我们应该非常慎重地处理这个问题。

We should approach this problem with great care.

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我们应该仔细慎重，做事之前要调查一番。

We should be circumspect and always investigate before acting,.

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