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新奇事件簿(翻译+字幕+讲解):科学家发现了世界上最干净的空气

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Scientists have discovered what they believe to be the cleanest air on Earth. Researchers from Colorado State University and the Australian Bureau of Meteorology conducted research on the purity of the air above Antarctica. They found a region over the Southern Ocean, between the south of Australia and Antarctica, that was "unaffected" by human activity. The scientists said the area they researched formed the atmosphere in the lower clouds. The analysis of the air showed that it was totally free from "anthropogenic aerosols". These are pollutants or particles derived from human activity, or dust from other continents. The scientists called this pollution-free area, "truly pristine".

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科学家发现了世界上最干净的空气
The scientists analysed the structure of airborne microbes in the lower clouds over the Southern Ocean. They looked at the DNA of the microbes and tracked where they came from. Their analysis included monitoring wind trajectories to detect how far the microbes may have travelled. They found that the atmospheric eco-system was very much "isolated," self-contained, and free from contaminants from elsewhere in the world. The source of the microbes was the Southern Ocean, rather than airborne pollutants from other continents. The researchers concluded that the Southern Ocean is one of very few places on Earth that has been "minimally affected by anthropogenic activities".

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重点单词   查看全部解释    
meteorology [.mi:tjə'rɔlədʒi]

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n. 气象学,气象状态

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isolated ['aisəleitid]

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adj. 分离的,孤立的

 
affected [ə'fektid]

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adj. 受影响的,受感动的,受疾病侵袭的 adj. 做

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derive [di'raiv]

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v. 得自,起源,引申于

 
unaffected ['ʌnə'fektid]

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adj. 不受影响的,不矫揉造作的,自然的

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analysis [ə'næləsis]

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n. 分析,解析

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atmospheric [.ætməs'ferik]

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adj. 大气的,大气层的,制造气氛的

 
source [sɔ:s]

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n. 发源地,来源,原始资料

 
pristine ['pristi:n]

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adj. 远古的,原始状态的,未受损的,新鲜而纯净的

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purity ['pjuəriti]

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n. 纯净,纯正,纯粹

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关键字: 南极洲 空气 南大洋

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