| 单词 | upgrading |
| 释义 | upgradingupgrading[ˈʌpɡreidiŋ]n.1.■浓缩2.■加强, 加固3.■提高质量4.■精选5.■改造; 改进upgrading of knowledge知识的更新 特殊用法crude oil upgrading1.■原油预处理cryogenic upgrading1.■深冷提纯gasoline upgrading1.■汽油提(高)质(量); 汽油改质hexane upgrading1.■己烷提级; 己烷改性octane upgrading1.■辛烷值提级upgrading of boiler weld1.■锅炉焊缝加强 |
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