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A new chemical extraction to remove basic nitrogen was studied in this paper.
研究了脱除柴油中碱性氮化物的一种化学萃取法。
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A third is certain basic chemicals such as carbon, oxygen and nitrogen.
第三种是某些基本的化学物质，如碳、氧和氮。
youdao
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A third is certain basic chemicals such as carbon, oxygen and nitrogen.
第三种是某些基本的化学物质，如碳、氧和氮。
youdao