“primary standard”概念、定义、翻译-科学时代

单词	primary standard
释义	环境科学与工程词汇手册 primary standard 原级标准；（水质）一级标准
随便看	sweet wort sweet yeast Sweezy, Paul swell swell swell swell swell swell swell swell swell swelled ground sweller swellfish swell-head swelling swelling agent swelling agent swelling capacity of coal swelling cheeks swelling clay swelling degree swelling ground swelling index

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。