Word · Frequency #4255
pH
氢离子指数，pH值
核心释义
a measure of acidity or alkalinity of a solution on a scale from 0 to 14, where 7 is neutral
- 1.
表示水溶液酸碱性(pH低为酸性,pH高为碱性)的量度,等于水合氢离子浓度(摩尔/升)的负对数。
Measure of the acidity (low pH) or basicity (high pH) of an aqueous solution, equal to the negative logarithm of the concentration of hydronium ions in molars.
表示水溶液酸碱性(pH低为酸性,pH高为碱性)的量度,等于水合氢离子浓度(摩尔/升)的负对数。；氢离子指数；[医] 药典; 苯基
用法In use
The gardener tested the soil's pH before planting the roses.
用法提示：此处pH指土壤的酸碱度数值。
You should check the pH of your aquarium water regularly to keep the fish healthy.
用法提示：此处pH指水体的酸碱度指标。
The pH of lemon juice is around 2, making it very acidic.
用法提示：此处pH用于描述柠檬汁的酸性程度。
the pH of [NP]
The pH of the water is 7.0.
水的pH值是7.0。
a pH of [number]
A pH of 7 is neutral.
pH值为7是中性的。
相关词与表达Connections
搭配Collocations
- pH level
- pH值
- The pH level of pure water is 7.纯水的pH值是7。
- pH value
- pH数值
- A pH value below 7 indicates acidity.pH值低于7表示酸性。
- pH scale
- pH标度
- The pH scale ranges from 0 to 14.pH标度的范围是0到14。
- pH balance
- 酸碱平衡
- Proper pH balance is essential for healthy skin.适当的酸碱平衡对健康皮肤至关重要。
- pH test
- pH测试
- We performed a pH test on the soil sample.
学习提示Learner notes
记忆技巧Memory Tip
pH值：p像天平砝码，H代表氢离子，7是平衡点，酸碱由此定。
语境与语域Context & Register
语域：技术/正式。常见使用场景：化学、生物学、医学、环境科学。通常用于表示氢离子浓度指数（pH值），多出现在学术或专业文献中。
发音与拼写Pronunciation & Spelling
Words ending in 'ph' are usually pronounced with /f/ (e.g., graph, photograph) or /mf/ (triumph, nymph), while 'ph' is pronounced as individual letters /piː eɪtʃ/. None rhyme.
用法优先级Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
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.