公布 中文名称：雾滴 英文名称：fog-drop 定义：悬浮在近地面空气层中直径介于几个微米到100μm的小水滴或小冰晶。 应用学科： 大气科学（一级学科）； 大气物理学（二级学科） 指从 漂浮雾 雾
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The vapour cone effect is caused by pressure differences around the aircraft. A sudden drop in pressure associated with high speed allows water vapour, which is normally invisible, to condense as fog.
蒸汽锥效应是由于战斗机周围的压力差所导致的，高速飞行时压力的陡然降低会使不可见的水蒸气凝结成雾气。
The Beijing Meteorological Center on Sunday afternoon issued a code yellow alert to warn about fog in the capital, saying visibility would drop to less than 500 meters in most parts of the city.
北京气象中心周日下午发布了大雾黄色预警称，绝大部分地区的能见度将不足500米。
Dense fog shrouded Beijing Sunday evening, causing experts and the public to worry about a likely drop in the capital's air quality.
浓雾笼罩北京城，这也让专家还有普通民众开始担心首都的空气质量会有下降。
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