The innermost level consisted of lower level practices such as pair programming; coding standards; unit and function testing; refactoring; simple design; and the 40-hour week.
最内层的级别包括比较底层的实践，比如结对编程、编码标准、单元测试和功能测试、重构、简单设计，以及每周工作40小时。
On this basis, the function and design of every hardware circuit unit are proposed in detail.
在此基础上，详细介绍了各硬件单元电路的功能和电路设计。
The system function 30% what reasonable design, 20% what air conditioning unit, 50% what installation quality quality.
系统功能30%在于设计合理，20%在于空调机组质量，50%在于安装质量。
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