This is a special tip test method, for different grades of steel can be distinguished.

这是一种鼻尖专用的测试法，对于不同标号钢材均可区分。

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How much you tip depends on the service, which can really put your math skills to the test!

你给多少小费取决于服务的质量，这将是对数学技能的考验！

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Here's a tip: you might decide to implement a portion of your monitor model, test your application and model, then add more elements to the model, and so on.

提示：您可能决定实现监视器模型的某个部分，测试您的应用程序和模型，然后向该模型添加更多的元素，以此类推。

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