他的新方法所起的作用是无法正确估计的。

The effect of his new method is imponderable.

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正规的研究结果可能无法正确估计非正规的体制，例如，意大利宽松的提前退休制度帮助降低了年轻人的高失业率水平。

Formal studies can fail to take proper account of informal structures - for example, that Italy's generous system of early retirement has helped to ease high levels of youth unemployment.

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但是，现实中经营过程设计能力与实际性能不一致的现象使得我们无法正确估计和预测经营过程性能参数， 妨碍了过程集成的有效实现。

But, the difference between design performance and practical performance of BP prevents us from monitoring and prediction, which impedes the implementation of process integration.

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