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1. The chemicalindustry relies heavily on the productionof chlorine in rings.
化学工业严重依赖氯环的生产。
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2. The researchers foundthat the presence of chlorine inrings could be a sign of contamination.
研究人员发现氯环的存在可能是污染的标志。
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3.The chlorine in rings is believedto have played a role in the formationof the Earth's atmosphere.
人们认为氯环在地球大气形成中发挥了作用。