有人一直坚持锻炼身体,风雨无阻。可其实,有些天气出去锻炼,反而会影响身体健康,比如雾天。雾是空气中的水分达到饱和之后,与极微小的颗粒结合在一起形成的。雾悬浮在近地面,降低了地面污染物向高空扩散的速度。因此雾天的空气虽然湿润但并不清洁。 Some people always insist on exercise, unhindered. In fact, some weather out exercise, but will affect their health, such as foggy. Fog is the water in the air to reach saturation, with tiny particles together formed. The fog floats near the ground, reducing the rate at which ground pollutants diffuse into the sky. So the foggy air is moist but not clean.