浓厚的烟雾使得视线难以超过几米。

The thick smog made it difficult to see more than a few meters ahead.

浓厚的烟雾正在覆盖一些大型的工业城市.

A blanket of smog is covering large industrial cities.

荷兰鹿特丹附近一座化工厂着火，发散出浓厚的烟雾，南部地区因此进入最高戒备状态。

Southern areas of the Netherlands are on the top state of alert after a blaze at a chemical plant near Rotterdam sent out a thick plume of smoke.