第一章解释了本书内容的范围和区域，为完成更高的系统质量保留了章节封面的七十五个“条目”。
The first chapter explains the book's scope and areas of concern, and the remaining chapters cover seventy-five "items" for achieving higher system quality.
2005年空气质量准则第一次为可吸入颗粒物（PM）确定了一项指导值。
The 2005 AQG set for the first time a guideline value for particulate matter (PM).
的企业精神，以“顾客至上、质量第一”为宗旨！
Spirit of enterprise, "the customer first, quality first" for the purpose!
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