Word · Frequency #13261
alkalis
碱
alkalis is the plural of alkali.
核心释义
A caustic base, such as soda, potash, ammonia, or lithia, that dissolves in water and alcohol and reacts with oils and fats.
- 1.
One of a class of caustic bases, such as soda, soda ash, caustic soda, potash, ammonia, and lithia, whose distinguishing characteristics are dissolving in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue.
用法In use
The soil in this region contains so much alkali that few plants can survive there.
用法提示:这里“alkali”作不可数名词,指土壤中的碱性物质(碱)。
Manufacturers use alkali to make soap and detergents.
用法提示:“alkali”作名词,指用于生产的一类碱性物质(碱)。
Some alkalis can burn your skin if you touch them directly.
用法提示:“alkalis”是“alkali”的复数形式,指多种碱性物质。
be + an alkali
alkali 作可数名词时,复数形式为 alkalis 或 alkalies。
This substance is an alkali.
这种物质是碱。
alkali + dissolve in + liquid
该用法来自词典对 alkali 的定义特征:能溶于水和酒精。
相关词与表达Connections
搭配Collocations
- alkali metal
- 碱金属
- Sodium is an alkali metal.钠是一种碱金属。
- alkali soil
- 碱性土壤
- Some plants grow well in alkali soil.有些植物在碱性土壤中生长良好。
- strong alkali
- 强碱
- Handle strong alkali with care.小心处理强碱。
- alkali solution
- 碱溶液
- The laboratory prepared an alkali solution for the test.实验室为测试配制了一种碱溶液。
- alkali content
- 碱含量
学习提示Learner notes
记忆技巧Memory Tip
碱性电池上写着 alkaline,开头同样是 alk;看到 alk 就想到碱,所以 alkali=碱。
语境与语域Context & Register
语域:formal 常见场景:chemistry、scientific writing、laboratory、industrial chemistry “Alkali” 是较正式的化学术语,通常用于科学文献、实验室及工业技术语境;日常口语中较少使用,常用 base 代替。
语法说明Grammar Note
复数有两种拼写:alkalis 和 alkalies。
发音与拼写Pronunciation & Spelling
发音相近的单词:'lie'、'lye'、'fly'、'reply' 结尾都发 /laɪ/,与 'alkali' 的尾音 /laɪ/ 相同,但由于 'alkali' 重音在首音节,这些词并不与它押韵。拼写相似的 'Bali'、'Ali' 则读作 /ˈbɑːli/、/ˈɑːli/,结尾是 /li/,与 'alkali' 的 /laɪ/ 不同,是形近音异词。
一起学习词形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, WIKTIONARY.