Ⅰ. mist “雾”指比fog 薄的“薄雾”，形容词为：misty. 它还可指：“(眼睛)朦胧”等。如：
① The mountain top was covered with mist. 山顶笼罩着雾气。
② She tried to see him through the mist of tears. 她试着透过朦胧的泪眼看他。
Ⅱ. fog 指较浓的“浓雾”，其形容词为：foggy.如：
③ The fog was so thick that he had to drive very slowly. 雾太浓了， 他必须慢慢地开车。