concentration
n. 集中, 专心 [化] 浓度; 浓缩
发音
词形变化
别名
教材释义与例句
浓度；集中；浓缩；专心；集合
释义与例句
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1.
The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.
专注力
不可数 -
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.
不可数 -
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.
不可数 -
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.
不可数 -
5.
A field or course of study on which one focuses, especially as a student in a college or university.
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6.
The proportion of a substance in a whole.
浓度
不可数 -
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))
不可数 化学 -
8.
The matching game pelmanism.
不可数
词汇关系
同义词 9
反义词 2
上位词 10
下位词 10
相关短语
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.
来源：wiktionary