The 2005 AQG set for the first time a guideline value for particulate matter (PM).

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。

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This principle has an important guideline value for establishing system, system operating and enhancing the effectiveness of systems.

这一原则也对制度设置、制度运作和增强制度有效性等具有重要的指导价值。

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Objective: To explore the clinical guideline value of novel real - time three - dimensional echocardiography (RT- 3DE) in percutaneous transcather closure treatment of atrial septal defect (ASD) .

目的：探讨新的实时三维超声心动图（RT-3DE）技术对经皮导管封堵先天性心脏病房间隔缺损（ASD）的指导应用价值。

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For instance, the recent guideline on fair-value accounting, which decrees that companies must show equity holdings at their market value, also contains a provision that allows them to avoid writing down shares if they think that they will soon recover in value.

ECONOMIST: Company accounts