“封四”概念、定义、翻译-科学时代

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。

单词	封四
释义	图书馆、情报与文献学词汇手册封四 back cover
随便看	upstart upstream upstream upstream upstream upstream upstream activating sequence upstream activating sequence--upstream activating sequence（UAS） upstream activating sequence（UAS） upstream bandwidth upstream bottom current upstream company upstream expressing sequence upstream expressing sequence--upstream expressing sequence（UES） upstream expressing sequence（UES） upstream firm upstream freight rate upstream industry upstreaming ion upstream migration upstream minimum water level upstream mouse sequence upstream pressure controller up-stream pricing upstream repressing sequence