Natural aerosols are produced by sea salt, desert dust, volcanic eruptions and smoke from forest fires.
天然的浮质是由海盐、沙漠灰尘、火山爆发物与森林火情的烟雾产生的；
The next moment all the family could see a cloud of dust in the road as the Wolf fled to safety in the dark forest.
不一会儿，这家人看见，路上尘土飞扬，狼飞快地逃往森林深处。
One day, when Ali Baba was in the forest, and had just cut wood enough to load his asses, he saw at a distance a great cloud of dust, which seemed to approach him.
一天，当阿里巴巴进到树林里，并且刚砍到了足够的木头运到驴车上的时候，他远远的望见了一大片尘土，看起来向他的方向接近过来。
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