concentration

名词 n.
中文释义
英 /ˌkɒn.sənˈtɹeɪ.ʃən/    美 /ˌkɑn.sənˈtɹeɪ.ʃən/

英文释义

名词 n.
  1. The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated. uncountable,usually
    — 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.
  2. The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.; The direction of attention to a specific object. uncountable,usually
  3. The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.; The act, process or product of reducing the volume of a liquid, as by evaporation. uncountable,usually
  4. The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.; 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. uncountable,usually
  5. A field or course of study on which one focuses, especially as a student in a college or university. uncountable,usually
  6. The proportion of a substance in a whole. uncountable,usually
    — 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.
  7. The proportion of a substance in a whole.; The amount of solute in a solution measured in suitable units (e.g., parts per million (ppm)) physical,uncountable,usually
  8. The matching game pelmanism. uncountable,usually

词形变化

concentrations plural

词汇关系

衍生词
bioconcentration concentrational concentration camp concentration cell concentration effect concentration table concentration time concentration-time curve critical micelle concentration cryoconcentration deconcentration haemoconcentration hemoconcentration hyperconcentration leukoconcentration mascon minimum inhibitory concentration molal concentration molar concentration n-firm concentration ratio nonconcentration overconcentration preconcentration radioconcentration reconcentration superconcentration time of concentration
相关词
salinity

词源

From New Latin concentrātiō (“(1550) action or an act of coming together at a single place; (1659) extraction or separation of one or more of the metals present in an alloy”). Compare French concentration, Spanish concentración, Italian concentrazione (last quarter of 16th century). Equivalent to concentrate + -ion. By surface analysis, con- + centre + -ate + -ion.
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