atmospheric pressure air

In order to study the effect of atmospheric pressure air plasma on insulating material surface modification, using dielectric barrier discharge to modify polystyrene surface.

为了研究大气压空气等离子体对绝缘材料表面改性的影响，采用介质阻挡放电对聚苯乙烯进行了表面改性。

Every 1000 metres increase in altitude reduces atmospheric pressure - and hence the density of the air - by about 11 per cent (though the precise formula is more complicated than this).

海拔每上升1000米大气压力- - -也就是空气密度- - -会降低大概11%(虽然精确的公式比这要更复杂。)

To get a feel for what this would mean, bear in mind that the amount of oxygen in a given volume of air changes with atmospheric pressure, and the local pressure changes with the weather.

要了解这将意味着什么？给定体积的空气中的含氧量是随着大气压变化而变化的，而当地的气压又是随天气变化的。