该预算成本也要定期更新，以反映完工前的预测成本，并确保项目完工前的现金投入。

The budgeted cost should also be updated periodically to reflect the estimated cost to completion as well as to insure adequate cash flows for the completion of the project.

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例如，图5.1中的a点表现在对应的完工百分比上其成本却有所超支，即在该点劳动量完成了40%，但成本支出却占到了预算成本的60%。

For example, point a in Figure 5.1 suggests a higher expenditure than is normal for the completion proportion. This point represents 40% of work completed with an expenditure of 60% of the budget.

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例如，图5.1中的a点表现在对应的完工百分比上其成本却有所超支，即在该点劳动量完成了40%，但成本支出却占到了预算成本的60%。

For example, point a in Figure 5.1 suggests a higher expenditure than is normal for the completion proportion. This point represents 40% of work completed with an expenditure of 60% of the budget.

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