Word · CEFR C2 · Frequency #19872
selectivity
选择性;选择度
the quality of being selective; the ability to choose carefully among options
- 1.
The quality of being selective, or extent to which something is selective.
选择性;可选择性程度。
- 2.
the property of being selective
选择性
- 3.
The ability of a radio receiver to separate a desired signal frequency from others.
无线电接收机将所需信号频率与其他频率分离的能力。
- 4.
Discrimination of a reactant towards a choice of other reactants; the ratio of rate constants for different reactants.
反应物对多种反应物的选择性;不同反应物的速率常数比。
- 5.
An approach to social work that prioritizes people perceived as having the most need for assistance.
社会工作的一种方法,优先考虑被认为最需要帮助的人。
选择性;可选择性程度。;选择性;无线电接收机将所需信号频率与其他频率分离的能力。;反应物对多种反应物的选择性;不同反应物的速率常数比。;社会工作的一种方法,优先考虑被认为最需要帮助的人。
In use
The selectivity of the university's admissions process means only the top applicants are accepted.
This chemical method is valued for its high selectivity, so it reacts only with the desired compound.
A good search engine should offer both speed and selectivity so users find exactly what they need.
selectivity of sth
表示某事物自身具有的选择性。
The selectivity of the catalyst is remarkable.
这种催化剂的选择性很出色。
selectivity for sth
表示对特定目标的选择性,常与 show 或 have 搭配。
The method shows high selectivity for the target molecule.
该方法对目标分子显示出高度的选择性。
selectivity in sth
Connections
Collocations
- high selectivity
- 高选择性
- The catalyst shows high selectivity for the desired product.该催化剂对目标产物显示出高选择性。
- low selectivity
- 低选择性
- Low selectivity makes this method unsuitable for separating similar compounds.低选择性使该方法不适合分离相似化合物。
- degree of selectivity
- 选择程度
- The degree of selectivity depends on the reaction temperature.选择程度取决于反应温度。
- selectivity coefficient
- 选择系数
- The selectivity coefficient measures how well the sensor distinguishes between ions.选择系数衡量传感器区分不同离子的能力。
Synonyms
- discrimination
- 辨别力;区分能力 · 强调分辨细微差别的能力,与 selectivity 含义接近,但注意 discrimination 还有“歧视”的贬义;不用于化学等专业的选择性。
Learner notes
Memory Tip
由 select(选择)联想:能精挑细选,就是 selectivity(选择性)。
Context & Register
语域:formal 常见场景:学术论文、化学/工程文献 selectivity 比较常见于正式或技术语境,多用于学术写作或化学等专业领域;日常口语中通常较少使用。
Grammar Note
表示不同种类或程度的选择性时,可用复数形式 selectivities。
Pronunciation & Spelling
这些词都以 /tɪvəti/ 结尾,与 selectivity 押韵(重读元音和后面音节相同)。注意 selective /sɪˈlɛktɪv/ 和 select /sɪˈlɛkt/ 虽形近,但读音不同,没有 /əti/ 结尾,不押韵。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY.