“ppm--ppm (parts per million)”概念、定义、翻译-科学时代

单词	ppm--ppm (parts per million)
释义	水利水电词汇手册 ppm (parts per million) 百万分率，百万分之
随便看	blunt blunt assault blunt body blunt body blunt delta blunt dissection blunt drill blunt end blunt end blunting bluntness ratio blunt-snout blur blur blur Blu-ray Disc Association Blu-ray Disc (BD) blurb blurb blurb blurbwriter blur level blurred blurred image blurred image

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。

ppm (parts per million)