因为温暖的空气比冷空气能容纳更多的湿气,所以只有当大气中的水蒸气量随着温度的升高而增加时,相对湿度才会保持不变。
Because warm air can hold more moisture than cool air, the relative humidity will be constant only if the amount of water vapor in the atmosphere increases as the temperature rises.
当空气接近海岸时,陆地会减缓它的速度并使其在此堆积。
When the air gets closer to the shore, it's slowed down by the land and starts to pile up.
MERV等级可以让你知道当花粉和霉菌在空气中传播时,过滤器将如何将之过滤。
A MERV rating tells you how well the filter can remove pollen and mold from the air as it passes through.
它们产生的排放量将取决于驱动它们的电力是如何产生的,而刹车、轮胎和道路在磨损时都会产生微小的空气颗粒。
The level of emissions they cause will depend on how the electricity to run them is generated, while brakes, tyres and roads all create tiny airborne particles as they wear out.
当志愿者在正常的空气中、纯氧的环境下,或者混有超过正常的二氧化碳含量的空气中呼吸时,他们被要求要想着打哈欠。
Volunteers were told to think about yawning, while they breathed either normal air, pure oxygen, or an air mixture with an above-normal level of carbon dioxide.
当前面的鸟上下移动它的翅膀时,产生的空气力会带动下一只鸟。
When the front bird moves its wings up and down, the resulting force of the air lifts the next one.
呼吸时胸部肌肉使胸廓扩大让空气吸入肺部。
In breathing the chest muscles expand the rib cage and allow air to be sucked into the lungs.
从屋顶吸出的这种热空气,在到达温室后部第二个被海水润湿的纸板壁时,便与温室空气混合。
This heated air, drawn down from the roof, then mixes with the greenhouse air as it reaches a second sea-water-moistened cardboard wall at the back of the greenhouse.
当志愿者在正常的空气中、纯氧的环境下,或者混有超过正常的二氧化碳含量的空气中呼吸时,他们被要求要想着打哈欠。
Volunteers were told to think about yawning while they breathed either normal air, pure oxygen, or an air mixture with an above-normal level of carbon dioxide.
它们只是简单地感觉到它们所处环境的变化,例如,当土堆的壁被破坏时,会改变空气的循环。
They simply sense changes in their environment, as for example when the mound's wall has been damaged, altering the circulation of air.
然后就会下雪,因为当空气上升时,它就会冷却并失去保持水蒸气的能力。
Then it snows because as the air rises, it cools off and loses its capacity to hold water vapor.
当空气温度较高时,含有较重同位素氧-18的蒸汽比含有氧-16的蒸汽更容易凝结,并形成雪状的降水。
When the air was warm, vapor containing the heavier isotope, oxygen-18, condensed and formed precipitation, in the form of snow, more readily than did vapor containing oxygen-16.
当玻璃杯装满水时,水就会把杯里的空气挤出去。
When the glass is filled with water, the water pushes the air out of the glass.
误差的一个来源是折射,即光束通过不同温度和压力的空气层时发生的弯曲现象。
One source of error is refraction, the bending of light beams as they pass through air layers of different temperature and pressure.
当空气轻柔地流动时,风也是柔和的。
当阳光落在空气中的水滴上时,它们就形成了。
当青蛙不在水里时,它们的身体可以通过皮肤吸收空气。
When frogs are not in water, their bodies can take air through their skin.
当攀登者接近珠穆朗玛峰的顶部时,他们很难吸入空气。
It's very hard for the climbers to take in air as they get near the top of Qomolangma.
当他们用风扇获得凉爽的空气时,他们也在体验中国文化。
While they were having their fans to get cool air, they were also experiencing Chinese culture.
当有人打喷嚏或咳嗽时,病毒可以在空气中传播一米远,所以你在与感冒患者交谈时最好站在适当的距离。
When someone sneezes (打喷嚏) or coughs, the viruses can travel as far as one meter through the air, so you'd better stand a proper distance while talking to someone who has a cold.
每个人都知道街道上有空气污染,但发现自己家也会受到污染时,人们会感到十分震惊。
Everyone knows that there is air pollution in the street, but it's a shock when you discover that you are also in danger from pollution in your own home.
在炎热的夏天开车时,你可能会在路上看到闪闪发光的水,但科学告诉我们,这其实只是海市蜃楼,是空气加热造成的幻觉。
When driving in a car on a hot summer day, you may see what looks like shimmering water on the road, which, as science tells us, is really just a mirage, an illusion caused by the heating of the air.
但是电解液会挥发,因此当这种肌肉暴露在空气中时就会干涸。
But the electrolyte can evaporate, causing the muscle to dry out when exposed to the air.
他们的方法揭示出了这样一个事实:水蒸气会改变雷达波穿越空气时的速度。
Their method exploits the fact that water vapour changes the speed at which radar waves travel though air.
在保证易腐食品的冷藏运输时,空气循环是最重要的因素之一。
Air circulation is one of the most important factors in protecting refrigerated loads of perishable foods.
在温度足够高时,与空气接触的熔融钛会着火。
At temperatures high enough to melt it, titanium exposed to air catches fire.
当水气凝结成水滴时,能量会被释放出来,使得周围的空气变暖。
When water vapour condenses into cloud droplets it gives up energy and warms the surrounding air.
回收或重用这些设备能够节省材料,阻止空气和水污染。降低制造时产生的温室气体的排放。
Recycling or reusing these devices conserves materials, prevents air and water pollution, and reduces greenhouse gas emissions that occur during manufacturing and processing.
朦胧中,我穿着瑜伽课程时同样的服装,走进了曼哈顿沉重的空气中。
In a haze, I walked out into the heavy Manhattan air in the same clothes I'd worn to yoga.
朦胧中,我穿着瑜伽课程时同样的服装,走进了曼哈顿沉重的空气中。
In a haze, I walked out into the heavy Manhattan air in the same clothes I'd worn to yoga.
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