It's blanketed in smog every winter as the cold air traps dust in the atmosphere above the city.

每年冬天，由于冷空气将灰尘困在城市上空的大气中，它都被雾霾所笼罩。

There's more heat in the air, trapped by the greenhouse gases humans continue to pump into the atmosphere.

由于人类不断排放到大气中的温室气体，空气中的热量增加了。

With COPD, the airways become obstructed, and the lungs don't empty properly, and that leaves air trapped inside the lungs.

慢阻肺患者的气道被堵塞，肺不能适当排空，所以会有很多气体滞留于肺中。

The heat wave has been blamed on a layer of warm air trapped by a ridge of high pressure in the region.

这次热浪的成因是该地区一处高压脊拦住了一股热空气。

Labs all over the world use elements trapped in air, trapped in ice cores, to paint a map from our distant past to today.

世界各地的实验室使用困在空气中的元素，困在冰核中，描绘一幅从我们遥远的过去到今天的地图。

Snowfall helps to protect plants and some wild animals from winter weather. Fresh snow is made largely of air trapped among the snow crystals.

降雪有助于保护植物和一些野生动物免受冬季天气的影响。 新雪主要由雪晶中的空气组成。

When we say a little baby has " gas" (gas), we mean they have air trapped inside their body that may make them feel uncomfortable.

当我们说小婴儿有“气体” （gas）时， 我们的意思是他们体内有空气滞留， 这可能会让他们感到不舒服。

Climate scientists routinely examine ancient air trapped in polar ice to glean insights into the state of the climate hundreds or even thousands of years ago.

气候科学家定期检查极地冰层中的古代空气，以了解数百甚至数千年前的气候状况。