As winter approaches, the cold air acts as a blanket covering the ground trapping air pollutants.

随着冬季的来临，寒冷的空气如同厚重的毯子，覆盖在地面上，封锁住了空气污染物对外流通的渠道。

Normally, between the polar vortex stays where it's supposed to be-in the North Pole, trapping frigid air up where it belongs.

通常, 位于北极的极地漩涡限制住了寒冷空气。

Clothes help by trapping air against your skin.

加热以加热备用空气。 衣服有助于将空气困在下面。

Well, when this type of soap is made, it's whipped and moved around really quickly, trapping air bubbles inside the soap.

好吧，当制作出这种类型的肥皂时， 它会被快速搅打并四处移动，从而将气泡困在肥皂中。