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VOA慢速英语:专家称湄公河新的天蓝色可能是令人担忧的迹象
2019-12-17来源:和谐英语
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sediment – n. materials that collect at the bottom of a liquid
erosion – n. when parts of something or damaged or removed by the sea, rain or wind
unleash – v. to suddenly cause a strong reaction
Co. – abbreviation short for the word company
Ltd. – abbreviation short for the word limited
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