The work involves either designing, modelling, testing and producing prototypes of brand new products, or making improvements to existing products.

工作会包含设计，模型制造，新产品的测试和生产原形的工作部分，或者对现有产品的升级改进。

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Economics provides the means of analysing the key features of problems by formally modelling economic relationships and testing beliefs about economic behaviour against the available data.

通过建立经济关系模型和对现有数据的经济行为进行测试，经济学家们提供了分析以上问题的主要特点的方式。

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These methods were applied to testing and modelling of the electrohydraulic loading control system of a component fatigue testing machine, and the results obtained were satisfactory.

应用这些方法对构件疲劳试验机电液力控制系统进行测试和建模，取得了满意的结果。

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