每当寒冷的冬天到来,北方的人们就会在室内开空调、烧暖气来取暖,所以室内的温度很高。此时,空气中的水蒸气因为温度升高而变热开始飘动,当它们飘到玻璃窗前时,碰上冰冷的玻璃就凝结了,形成冰花。这也就是冬天当我们出门后,如果张口说话,一开口就能哈出很多白色的热气;当我们从室外进入室内时,如果戴着眼镜,那么眼镜上会蒙上一层 Whenever the cold winter comes, people in the north will air-condition indoors and heat them up for heating, so the temperature in the room is very high. At this point, the water vapor in the air became warmer as it warmed and began to float. As they floated to the glass window, the ice-cold glass clotted and formed ice crystals. This is also the winter when we go out, if the mouth to speak, an opening will be able to haze a lot of white heat; when we enter the room from outside, if wearing glasses, then the glasses will be put a layer