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单词 concentration
释义

concentration

English

Etymology

concentrate + -ion

Pronunciation

  • (Received Pronunciation) IPA(key): /ˌkɒnsənˈtɹeɪʃən/
  • (General American) IPA(key): /ˌkɑnsənˈtɹeɪʃən/
  • (file)
  • Rhymes: -eɪʃən

Noun

concentration (usually uncountable, plural concentrations)

  1. The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.
    1. The direction of attention to a specific object.
    2. The act, process or product of reducing the volume of a liquid, as by evaporation.
    3. The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water.
  2. A field or course of study on which one focuses, especially as a student in a college or university.
  3. The proportion of a substance in a whole.
    • 1972, Orleans, Leo A., Every Fifth Child: The Population of China, Stanford, CA: Stanford University Press, →ISBN, LCCN 70-190527, OCLC 1060533181, OL 5710549M, page 117:
      The Koreans
      Almost all the Koreans in China live in the north-eastern provinces. The greatest concentration is found in an area of approximately 1,200 square miles in Kirin Province, an area which is part of the Yen-pien Korean Autonomous Chou.
    • 2013 July-August, Philip J. Bushnell, “Solvents, Ethanol, Car Crashes & Tolerance”, in American Scientist:
      Surprisingly, this analysis revealed that acute exposure to solvent vapors at concentrations below those associated with long-term effects appears to increase the risk of a fatal automobile accident. Furthermore, this increase in risk is comparable to the risk of death from leukemia after long-term exposure to benzene, another solvent, which has the well-known property of causing this type of cancer.
    1. (chemistry) The amount of solute in a solution measured in suitable units (e.g., parts per million (ppm))
  4. The matching game pelmanism.

Coordinate terms

  • (course of study): major, minor

Derived terms

  • concentration camp
  • concentration-time curve
  • critical micelle concentration
  • molal concentration
  • molar concentration
  • n-firm concentration ratio

Translations

The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

See also

  • salinity

Further reading

  • Concentration (disambiguation) on Wikipedia.Wikipedia
  • Concentration (chemistry) on Wikipedia.Wikipedia

French

Etymology

First attested 1732, from concentrer + -ation.

Pronunciation

  • IPA(key): /kɔ̃.sɑ̃.tʁa.sjɔ̃/
  • (file)

Noun

concentration f (plural concentrations)

  1. concentration (mental state of being concentrated)
  2. concentration (quality of being concentrated)
    la concentration de sucre
    the concentration of sugar

Derived terms

  • camp de concentration

Descendants

  • Romanian: concentrație
  • Turkish: konsantrasyon

Further reading

  • concentration”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

Interlingua

Noun

concentration (plural concentrationes)

  1. concentration (state or degree of being concentrated)
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