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1. The mining company has been accused of tungsten contamination in the area.
该公司因该地区的钨污染而被指控。
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2. The research team found evidence of tungsten contamination in the water samples.
研究团队在水样中发现了钨污染的证据。
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3. The government is working to reduce tungsten contamination in the environment.
政府正在努力减少环境中的钨污染。