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Ethylene and trans - dichloroethylene are both inactive in the infra - red in this region.
乙烯和反式二氯乙烯在红外光谱的这个区域都无活性.
辞典例句
Ethylene and trans - dichloroethylene are both inactive in the infrared in this region.
乙烯和反式二氯乙烯在红外光谱的这个区域不出现吸收峰.
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