可是，普适性智力因子其实也能预测工作业绩，并且在很多内容复杂的工作业绩的预测方面，它甚至要比其他任何单独指标(如教育水平或工作经验)更能说明问题。

But general mental ability also predicts job performance, and in more complex jobs it does so better than any other single personal trait, including education and experience.

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有时候可以根据问题域的理论知识预测复杂性，但是在编写代码时，又会产生新的约束和机会，这些实际上是无法预测的。

You can sometimes predict complexity based on speculative knowledge of the problem domain, but writing code creates new constraints and opportunities that are virtually impossible to predict.

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五族非平凡群具有复杂性和对称性的特例，也更加难于预测。 其中复杂部分的细节问题已经困扰了人们近120年。

The five non-simple groups—dubbed“exceptional” in their complexity and symmetry—are harder to envisage and, for almost 120 years, the details of the mostintricate of these have lain beyond reach.

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