The results showed that mass mean diameter (MMD), and drop size distribution parameter N changed with pressure drop, air velocity, and fuel viscosity.

结果表明，液雾的质量中间直径（MMD）和尺寸分布参数N将随着喷嘴压力降、空气流速、燃油性质而变化；

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Objective:To examine the protective effect of N acetylcysteine (NAC) on the immunosuppression after repetitive simulated air diving in rats.

目的 ：观察 N-乙酰半胱氨酸 （NAC）对大鼠模拟空气反复潜水后免疫抑制的预防作用。

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The U. N. report found that the average level of small particulate matter in Beijing's air in 2006 was three times as high as the level recommended by the World Health Organization.

该报告称，2006年北京空气中的可吸入颗粒物平均含量是世界卫生组织（World Health Organization）建议水平的三倍。

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And if you put this in the well-ventilated area, if you prepare this outside, the h c n gas will actually be released into the air, so you're safe, you can eat it later.

而如果你把它们放在通风良好的地方，在室外处理，那么氰化氢气体,将会被释放到空气中，这样你就安全了，过后就可以吃了。

麻省理工公开课 - 化学原理课程节选

Ironically, there are rumors of flagging Navy support in recent budget deliberations for a program that could effectively provide U.S. carrier battle groups with several means for mitigating these missile threats: the Navy Unmanned Combat Air System (N-UCAS).

CENTERFORSECURITYPOLICY: Where are the carriers?

India's air force chief, N.

WSJ: India Still to Finalize Terms for Jet Deal With Dassault

In a concrete bunker on a mothballed Air Force base in Plattsburgh, N.

FORBES: Charlotte's Goat