名词
中文翻译：主要雾霾信号
同义词：
['major fog warning', 'major fog advisory例句：1. The weather forecast indicated a major fog signal for the area.（天气预报显示该地区有主要雾霾信号。）']
例句：
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1. The weather forecast indicated a major fog signal for the area.
天气预报显示该地区有主要雾霾信号。
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2.The city has issued a major fog signal due to the heavy snowfall.
由于大雪，该市已发布主要雾霾信号。
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3.The fog signal was so severe that it caused significant delays in traffic.
雾霾信号非常严重，导致交通严重延误。