单词 | parts per million |
释义 | parts per million in British English (pɑːts pɜː ˈmɪlɪən) plural noun ▶ USAGE The abbreviation for parts per million is ppmthe number of units (of a substance) present in a million units of another substance The city's water supply was analysed and found to contain two parts per million offluoride. Examples of 'parts per million' in a sentence |
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