Airports at higher altitudes require a longer airstrip due to lower air density.
在高海拔地区建机场，由于空气稀薄的原因，需要一个较长的跑道。
Even when the pressure stays the same, great changes in air density are caused by changes in temperature.
即使压力不变，气温的变化也能引起空气密度的巨大变化。
The air density in the exosphere is so low that atoms and molecules can escape from it into interplanetary space.
外逸层中空气的密度非常小，以致原子和分子都能逃逸到星际空间。
The new technique takes into account the effects of air density change and rotational speeds, thereby improving the analogy theory and making it applicable to compressible flow.
新方法考虑到工质密度和转速变化对压气机特性的影 响，改进了相似理论并使其可应用于可压缩流体计算中。
The air density distribution of the cross section could be reconstructed by SSART.
应用SSART技术可以重建截面密度分布。
The effects are most pronounced when temperature layers in the atmosphere produce sharp changes in air density and refractive index.
这种蜃像效应，在大气分层的温度造成大气密度剧烈变化时最为显著。
The article believes that the reduced air density in high- altitude district exerted certain influence on each part of the burning system.
文章认为，高海拔地区，由于空气密度降低，对烧成系统各部分都将产生一定的影响。对影响较小的可不改变原系统内各种设备的规格。
A distribution of air pressure and the mass of a given volume of air such that the air density is not a function only of atmospheric pressure.
一种气压的分布情况，其中给定体积内的空气质量，即空气的密度，不仅仅是气压的函数。
An empirical equation was obtained for explaining the relationship between streamer stability propagation field and relative air density, humidity.
通过数据拟合得到了流注稳态传播电场和相对空气密度以及湿度之间的经验公式。
An empirical equation was obtained for explaining the relationship between streamer stability propagation field and relative air density, humidity.
通过数据拟合得到了流注稳态传播电场和相对空气密度以及湿度之间的经验公式。
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