水的密度是空气密度的八百倍。
飞行所需要的动力直接关系与空气密度。
The forces necessary for flight are directly related to air density.
引擎将高超音速飞机带向空气密度、阻力比较稀少的高度。
That engine would carry the hypersonic craft to an altitude where air density and resistance are less.
若温度不变，则空气密度的变化与压力乘正比。
Thee density of air varies directly as pressure, with temperature being constant.
热空气比冷空气密度小，因此热空气总在冷空气上方。
Warm air is less dense than cooler air so it ends up layered on top of the downward moving cooler air.
冬天：寒冷、空气密度增加、风比较大，气流平稳。
Winter - Cold, dense air, strong winds at times with stable air.
即使压力不变，气温的变化也能引起空气密度的巨大变化。
Even when the pressure stays the same, great changes in air density are caused by changes in temperature.
不像水或者空气密度的，周期变化，我们这里，讨论的是电场。
So, instead of having the periodic variation of water, or the periodic variation of air density here we're talking about an electric field.
动态压力是一个功能的速度和空气密度，而这又是取决于海拔高度和温度。
Dynamic pressure is a function of velocity and air density, which in turn is dependant upon altitude and temperature.
风资源的评价不应当只有风速、风向、空气密度等常规指标，还应评估风的质量。
The appraisal of the wind resources cant be given only by the speed, direction, air density, etc.
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.
同一时期，海洋散热较慢，温度相对地较高，空气密度变化较小，遂形成相对的低压区。
The same period, the ocean thermal slow, relatively high temperature, air density changes smaller solipsism relative area of low pressure.
二位置通常使用确定空气密度根据在大量上的被测量的区别在二空气浮力人工制品之间。
Two of the positions are normally used to determine air density based on the measured difference in mass between two air buoyancy artefacts.
大气层是包围着地球的空气，根据空气密度的不同分为5层，总共有2000- 3000公里厚。
Earth's atmosphere is surrounded by air, the air density, divided into 5 layers, total of 2000-3000 km thick.
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。)
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).
结合相关公式分析了在一定条件下空气密度对空调性能产生重要影响，而湿球温度和海拔高度是影响空气密度的主要原因。
It was shown that wet bulb temperature and altitude could do effect on the air density which influence the performance of room air conditioner according with the other equation.
在约翰内斯堡，完全相同的射击既可能比球门飞得高也可能撞到人墙，因为更低的空气密度既降低了拖曳力也降低了旋转效应。
In Johannesburg, the exact same shot would either fly over the crossbar or hit the wall, as the lower air density reduces both drag and the effect of spin.
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。
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。
The article believes that the reduced air density in high- altitude district exerted certain influence on each part of the burning system.
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