清晨,我一出门,一股灰蒙蒙的气息扑面而来,能见度非常低。行人都纷纷戴起了口罩,小孩也都包裹得特别严实。到了校园里,同学们也都议论着天气,你一言我一语发表着自己的见解。还是经过老师的讲解,大家才明白:原来,这就是首都人民口中的雾霾。雾霾天气看起来像起了大雾一样,大雾是由地面空气中的水汽凝结形成的,而霾 Early in the morning, I went out, a gray atmosphere blowing, visibility is very low. Pedestrians are wearing masks one after another, children are particularly tight package. Arrived on campus, the classmates are also talking about the weather, you say a word in my own opinion. Or through the teacher’s explanation, we understand: It turned out that this is the mouth of the people of the capital smog. Foggy weather looks like a fog, the fog is formed by condensation of water vapor in the ground air, and haze