n.乙烯
The concentration of ethylene is on the high side. 乙烯浓度偏高。
The plant can produce up to 130 tons of ethylene each month. 这家工厂每月最高能生产一百三十吨的乙烯。
n.亚甲基
n.聚乙烯
n.三氯乙烯
n.全氯乙烯
n.聚甲烯(环烷烃；聚亚甲基)
