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单词 selectivity
释义

Trends of
selectivity

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selectivity in British English

(sɪˌlɛkˈtɪvɪtɪ)
noun
1. 
the state or quality of being selective
2. 
the degree to which a radio receiver or other circuit can respond to and separate the frequency of a desired signal from other frequencies by tuning
3. 
the principle that welfare services should go only to those whose need is greatest, as revealed by needs tests, means tests, etc

selectivity in American English

(səˌlɛkˈtɪvəti)
noun
1. 
the state or quality of being selective
2. 
the degree to which a radio receiver will reproduce the signals of a given transmitter while rejecting the signals of the others

selectivity in Chemical Engineering

(silɛktɪvɪti)
noun
(Chemical Engineering: Reactors and separators)
Selectivity is the degree to which a solvent prefers a particular solute.
The adsorbent contactor has a selectivity for CO₂ over CH₄ of at least 5.
The solvent selected should exhibit a high selectivity - it must dissolve the maximum amount of the solute.
Selectivity is the degree to which a solvent prefers a particular solute.

Examples of 'selectivity' in a sentence
selectivity

Prejudice occurs later through adult selectivity -- selecting what we wish to remember -- not in the childhood images themselves.
Conybeare, Stephanie A DEATH IN THE FAMILY (1993)
They specialized in going out in small groups, to look and learn, or to kill with a very high degree of selectivity.
Clancy, Tom WITHOUT REMORSE (1993)
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更新时间：2025/3/14 0:23:54