| 单词 | brown cloud |
| 释义 | > as lemmasbrown cloud brown cloud n. a thick cloud or fog of airborne pollution; the phenomenon of such clouds forming. ΚΠ 1977 Reno (Nevada) Evening Gaz. 5 May 9/1 The ‘brown cloud’ of pollution over Reno figured prominently in the discussion..of..auto emission controls. 1993 Fort Collins (Colorado) Triangle Rev. 21 Jan. 15 (advt.) A properly tuned car or truck can keep the brown cloud away by reducing emissions as much as 90%. 2002 Guardian 12 Aug. i. 3/1 Yesterday a team of international climatologists..said that they had identified the ‘Asian brown cloud’. This 10 million square mile, three kilometre thick, fluctuating haze of man-made pollutants is now spreading across the whole Asian continent and blocking out up to 15% of the sunlight. 2003 Wilson Q. Spring 83 Brown cloud is not just a phenomenon of cities; it can span an entire continent or ocean basin. < as lemmas |
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