| 单词 | brown cloud |
| 释义 | brown cloudnoun A visible pall of air pollutants that persists over a city or other area: the Asian brown cloud throughout the day, air shifts in the valley cause variances in the brown cloud...
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英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。