英语词汇“ppm”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

　

单词	ppm
释义	ppm Also PPM, P.P.M., p.p.m. parts per million. pulse per minute. Words nearby ppm P.P.F., PPH, PPI, ppl., PPLO, ppm, pPNET, PPO, ppp, PPPPPP, ppr. Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for ppm Prior to the Industrial Revolution of the late 19th and early 20th centuries, the carbon dioxide level was about 280 ppm. Earth Day: Discussing the Coming Climate Crisis With Heidi Cullen\|Dominique Browning\|April 22, 2012\|DAILY BEAST Today global atmospheric carbon dioxide concentrations are at 395 parts per million (ppm). Earth Day: Discussing the Coming Climate Crisis With Heidi Cullen\|Dominique Browning\|April 22, 2012\|DAILY BEAST Atmospheric carbon-dioxide levels have risen 38% in the industrial era, from 280 to 385 parts per million (ppm). Mother Nature's Nuclear Strike\|John Kerry\|July 8, 2009\|DAILY BEAST British Dictionary definitions for ppm ppm abbreviation for chem parts per million Also: PPM peak programme meter Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for ppm ppm abbr. parts per million The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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更新时间：2024/11/10 13:56:59