“PPM（portable people meter）”概念、定义、翻译-科学时代

单词	PPM（portable people meter）
释义	新闻与传播词汇手册 PPM（portable people meter）便携式收视测量仪
随便看	oil development oil dewaxing oil dewaxing oil diffusion pump oil diffusion pump oil diplomacy oil-dispersed coupler oil dollar oil dollar oil dope oil drainage oil drilling oil drip oil-drop glaze oiled cloth oiled filter oiled paper oil embargo oil embargo oil embargo oil emulsion adjuvant oil emulsion mud oil emulsion vaccine of Newcastle disease oiler oiler

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。