The key to an EGR system is introduced, and the control of exhaust gas quantity recirculation quantity of that in every point at best.

EGR系统的关键就是控制废气的引入量，使废气的再循环量在每一个工作点都达到最佳状况。

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At that point, typing the Control-p key combination writes the contents of the screen to your output file.

此时，键入Control - p组合键，将屏幕内容写到输出文件。

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After the planning, the key point of cost control is in the design stage, and in which the schematic design is the most important.

在项目作出决策后，控制工程造价的关键就在于设计阶段，而设计阶段中的方案设计阶段又尤为重要。

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