空气没有多少重量。
Air not only occupies space but it also has weight.
空气不仅占据空间，而且它还具有重量。
Water has weight, and air also has weight.
水有重量，空气也有重量。
The thin air of Mexico City, which lies at 2, 250m (7, 380 feet), reduces a plane’s range and the weight it can carry.
墨西哥城2,250米的高空处(7,380英尺)空气稀薄，这使航班的类型和载客重量都受到了限制。
In aerodynamic terms, lift is a function of weight, thrust and drag (air resistance).
在空气动力学上，升力是重量，推力和阻力(空气阻力)的相关的函数。
The air inlets comprises many moving parts, which increases the aircraft’s weight and radar reflections.
这种进气道由很多调节作动部件组成，从而增加了飞机的重量以及雷达反射面积。
With the hand held high in the air, hold the string so that the weight nearly touches the ground.
把手高高举在空中握住绳子，让重物几乎接触地面。
The FRES program will provide the British Army with a family of medium-weight, network-enabled, air-deployable armored vehicles to meet up to 16 battlespace roles.
FRES计划将为英国陆军提供一系列的中型、具有网络使能、可以空中部署的武装车辆，满足英国在战场空间中最多16种需求。
In fact, a group of researchers contend, a number of aspects of modern living — from lack of sleep to exposure to living with air conditioning — may be feeding Americans' weight woes.
一个研究小组认为，事实上，现代生活中有很多因素都有可能导致美国人不幸超重，比如睡眠不足和使用空调。
Atmospheric pressure is the weight of all that air against the surface of the earth.
大气压就是压在地球表面上的所有空气的重量。
Pause and feel the weight of your body in your seat, the feeling of the fabric against your skin, andthe slight sensation of the air on your face.
停下来，感受你身体的重量，感受面料和你的肌肤相触碰，还有空气在你脸上轻拂的细微体验。
What is the drill pipe string weight in air?
钻杆在空气中的重量是多少？
After some time of uninterrupted fall, the body is moving so rapidly that the drag of the air is as great as the weight of the body, so that there is no acceleration.
经过一些时间的自由降落后，落体运动得很快，以至空气拽力(阻力)与落体的重量相等，于是就没有加速度了。
To prevent snoring, doctors suggest sleeping on your side (ladies, roll him over if you need to), using nasal strips or losing weight (less pressure on the airways means more space for air to flow).
医生建议，要防止打鼾，可以侧睡（女士们，如果需要，帮他翻个身），使用鼻带，或减肥（减少气道压力会给空气流入增加空间）。
We know that air can be compressed, and it is reasonable to suppose that the air at the surface of the earth is compressed by the weight of all the air on top of it.
我们知道空气是可以压缩的，因而我们有理由假设：地球表面的空气受到该空气层上部所有空气重量的压缩。
If the helicopter is going to hover in place, the force it pushes on these tiny air balls will have to be equal to the weight of the helicopter.
如果想使直升机悬停于某处，这些空气微粒的推力必须相当于直升机重量。
Finally, burning firecrackers makes global warming become more serious and increases the weight of air pollution because of the carbon dioxide and other greenhouse gases it releases.
最后，放鞭炮会使全球变暖越来越严重，增加空气污染，因为它释放了二氧化碳和其他温室气体。
Air has weight, though it is very light.
空气具有重量，可是它很轻。
Though air has weight, it is very light.
虽然空气有重量，但是它很轻。
Department of the Air Self-cooling, with a small size, light weight, heat insulation, high-grade characteristics.
系空气自冷式，具有体积小、重量轻、绝缘耐热、等级高的特点。
空气有重量是真的。
空气有重量是真的。
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