英语词汇“unhealthful day”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	unhealthful day
释义	unhealthful day Any day in which the air quality for any of the 5 major ambient air pollutants—carbon monoxide, nitrogen dioxide, ozone, particulate matter, sulphur dioxide—exceeds an established air quality standard unhealthful day Public health Any day in which the air quality for any of the 5 ambient air pollutants–carbon monoxide, nitrogen dioxide, ozone, particulate matter, sulfur dioxide exceeds an established air quality standard. See Pollution Standards Index. Cf Unhealthy day.
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