英语词汇upstream of catalyst怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	upstream of catalyst
释义	upstream n — 下游 n • 上游部门 n upstream — 逆水 • 逆流 adv • 逆流而上 adj • 向上游 adv • 向上游 adj catalyst n — 催化 n • 催化剂 n • 诱因 n of — 的 catalyst — 触媒
随便看	documents storage documents subject to documents such as documents such as manuals, documents such as manuals, documents such as manuals, documents supplied document stated that document stating document stating that document statistically document status documents that documents that constitute documents that i require documents themselves documents to be attached documents to be delivered documents to be drafted documents to be filed documents to be filled documents to be lodged documents to be printed documents to be produced documents to be provided

英汉双解词典包含2273206条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。

upstream n —