The sections that follow describe a model that works well, along with alerts about common pitfalls to avoid as you structure the test hierarchy.

下一小节将描述一个运转良好的模型，在您构造测试层级的同时也伴随着避免常见缺陷的警报。

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Unit testing is still important, and it is possible to generate unit test harnesses by applying a series of transformations to the model as well.

单元测试仍旧是重要的，通过将一系列转换应用于模型，生成单元测试也是可能的。

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So our model did pretty well when we evaluate it with our randomly chosen test data, predicting a 14.2 MPG on a car whose actual value was 15 MPG.

因此，当我们用随机选择的测试数据对此模型进行测试时，此模型的表现非常出色，对于一辆实际值为15 MPG的车，我们的预测值是14.2 MPG。

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In order to test the theory they analyzed whether their data fit the predictions of a well-known theoretical model of short-termism developed by Harvard economics professor Jeremy Stein, who was recently named to the Board of Governors of the Federal Reserve System.

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