英语词汇“ambient air standard”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	ambient air standard
释义	WordReference Random House Unabridged Dictionary of American English © 2024 am′bient air′ stand′ard, Ecology, Physicsthe highest concentration of a specific air pollutant at a particular outdoor location, in a specified unit of time, that is not considered hazardous to humans:The ambient air standard for gas X is 3 parts per million per hour. 1970–75
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