/fɒg; US fɔ:g ||; fɔg/noun [U] [C] thick white cloud that forms close to the land or sea. Fog makes it difficult for us to see 浓雾: Patches of dense fog are making driving dangerous. 浓雾处处，驾驶容易肇祸。Bad fogs are common in November. 十一月多雾的日子很常见。 Fog is thicker than mist. Haze is caused by heat. Smog is caused by pollution. Look at the note at weather. fog是雾，mist是薄雾或霭。霾(haze)来自热气。烟雾(smog)来自污染。参看weather的注释。