| 词汇 | parts-per-million |
| 释义 | parts per million noun[ plural ] MEASURESukus → ppm Examples of parts per millionparts per million One micromolar is approximately 0.115 partspermillion. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Wheat and corn contain seven and three partspermillion respectively. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In rats subjected to a two-year feeding study, no observable effect was seen at 100 partspermillion (ppm). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Ozone concentrations are greatest between about 20and40 km, where they range from about 2 to 8 partspermillion. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The huge quantities of nickel ore processed makes up for the fact that platinum makes up only two partspermillion of the ore. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The acceptable level has been raised to ten partspermillion for ephedrine and twenty-five partspermillion for other substances. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Near its mouth, the concentration is 28 partspermillion. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Water chemists measure water impurities in partspermillion (ppm). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The report said that carbon dioxide levels in the soil averaged about 23,000 partspermillion, several times higher than is normal for the area. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In areas affected by acid mine drainage, the sulfate concentration ranges from 37 to 1375 partspermillion. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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