温度不变，空气的密度和压力成正比。
The density of air varies directly as pressure, with temperature being constant.
当温度不变时空气的密度同压力成正比。
The density of the air varies directly as pressure with temperature constant.
海平面空气的密度大于高山上空气的密度。
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 air density in the exosphere is so low that atoms and molecules can escape from it into interplanetary space.
如果说呼吸二氧化碳令人生厌的话，那么空气的密度就显得更为糟糕。
If breathing carbon dioxide seems uninviting, the density of the air will appear worse.
气压的-种分布情况，给定体积内空气质量，即空气的密度，仅仅是气压的函数。
A distribution of air pressure and the mass of a given volume of air such that the air density is a function of only 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。
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.
而如果这两种介质的密度相差较大，就像空气和水那样，那么大部分的能量将会折射回来，只有一小部分会继续传播进入到新的介质中。
If the two media have really different densities, like air and water, then most of the energy is going to be reflected back, very little of it will keep going and get transmitted into the new medium.
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.
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).
有很多因素能影响空气污染的程度，包括气候状况、周围环境、汽油排放量的多少以及交通密度。
The amount of air pollution created depended on a number of factors, including weather, surrounding structures, amount of gasoline pumped, and traffic intensity.
污染最轻的是美国和加拿大的城市，原因是它们的人口密度低，气候怡人，并且空气污染管理规定非常严格。
At the other end of the list are cities in Canada and the United States, which benefit from lower population density, favorable climates and stricter air pollution regulation.
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.
对密度大的货物空气阻力可忽略不计。
The air resistance may be overlooked if the load density is large.
神经毒剂的密度大于空气，致使它们对处在低洼地区的人们而言相当危险。
Nerve agents have more density than air, making them dangerous to people in low areas.
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.
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.
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.
低密度的空气一聚集水份，就很容易让它落下来。
As the atmosphere is thin, it tends to drop any water it picks up rather readily.
因此车辆上的乘客所面对的空气污染密度比骑车人要高2 - 4倍，污染物不同，程度也不一样。
Hence vehicle occupants are exposed to air with pollutant concentrations 2-4 times higher than that breathed by vehicle occupants, depending on the type of pollutant.
考虑到飓风和台风所具有的密度，引力和惯性，它们代表着空气团试图以互为相反的形式运动时所发生的状况。
Your hurricanes and typhoons represent what occurs when air masses attempt to move against each other, given their density and gravity attraction and inertia.
这足以说明，由于车辆速度及交通密度的影响，用于控制隧道中污染水平的所需新鲜空气会不规则的增长，且设计年也很重要。
Suffice it to say that the fresh air required to control pollution levels in a tunnel increases erratically with vehicle speed and traffic density and the design year is important.
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.
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.
海市蜃楼是沙漠里一种常见现象。它是光波在遇到不同密度的空气层而发生折射时引起的一种光幻象。
A common desert phenomenon is the mirage, an optical illusion caused when lights waves are bent or refracted by layers of air that are different in density.
在高膨松性非织造布的体积密度范围内，有空气对流传热机理存在。
There exists a heat transfer mechanism of air convection in the range of bulk density of high loft nonwoven fabrics.
在高膨松性非织造布的体积密度范围内，有空气对流传热机理存在。
There exists a heat transfer mechanism of air convection in the range of bulk density of high loft nonwoven fabrics.
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