Obtains a method for evaluating ventilation efficiency and air age after studying the ventilation course.

通过对通风过程的研究，得到了一个用于评价通风系统性能的通风效率和空气龄的方法。

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The fifth stage (20th century 70 ~ mid 80's) : "air age", cartoon teenagers in life has become an inseparable part of.

第五阶段（20世纪70〜80年代中期）：“空气龄”，在生活漫画青少年已成为不可分割的一部分。

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The air quality is reflected by CO2 concentration and air age. The thermal comfort evaluation in the cabin is on the basis of PMV-PPD (Predicted Mean Vote-Predicted Percentage of Dissatisfied people).

以CO2浓度和空气龄反映客舱内空气品质，PM V - PPD作为客舱内热舒适评价依据。

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(OMITTED) Remais,an assistant professor at Emory University's Rollins School of Public Health in Atlanta, He says the growing economy is fueling environmental risks such as air pollution and chemical toxins, while age-old environmental challenges remain.

VOA: standard.2010.04.07

He brought back the golden age of air travel and made money on it with his Virgin Atlantic airline, complete with Mad Men-style upstairs bars in the 747s and massages in the airport lounges.

FORBES: Business & Management Lessons From Sir Richard Branson

There is certainly no increase in the accident rate for scheduled air carrier pilots as they approach age 60.

FORBES: Fact and Comment

Nok Air has no flight attendants over the age of 30, says CEO Sarasin.

CNN: Do sexy flight attendants really sell more seats?