Rather than run a big, expensive study, it's a better use of resources to run many small tests and revise the design between each one so you can fix the usability flaws as you identify them.

比起大型昂贵的研究，善用好资源去进行许多小的测试和在每个测试之后迭代设计，你可以根据发现的可用性问题去改善它。

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And third, through intense reflection, he gathered the information that he needed to design and revise the procedure, and then, with a steady hand, he saved my life.

第三，通过紧张有致的综合思考，他获取了他所需的信息以此来设计和修改手术的进程，最后，他胸有成竹地帮我做了手术，救了我一命。

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Though the module design process analysis, one can very easy add and get rid of some procedures with target and environment changing constantly, but needn't revise the kernel part.

通过对程序模块化设计过程分析，可以很容易的随着应用对象和环境的不同不断添加和去除部分程序构件代码，而不用修改内核部分。

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