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chlorophyll + singular verb
chlorophyll 为不可数名词，谓语动词用第三人称单数形式。
Chlorophyll absorbs red and blue light.
叶绿素吸收红光和蓝光。
叶绿素
先理解核心含义，再看它在真实句子里的用法。
叶绿素
a green pigment found in plants and other photosynthetic organisms, used in photosynthesis
Chlorophyll absorbs red and blue light.
叶绿素吸收红光和蓝光。
植物叶绿体及其他光合生物(如蓝藻)中的一组绿色色素。
Any of a group of green pigments that are found in the chloroplasts of plants and in other photosynthetic organisms such as cyanobacteria.
光合生物中发现的任何一种绿色色素；自然界存在四种形式
any of a group of green pigments found in photosynthetic organisms; there are four naturally occurring forms
Chlorophyll is the green pigment that helps plants make food from sunlight.
叶绿素是帮助植物利用阳光制造养分的绿色色素。
Leaves contain chlorophyll, so they appear green in spring and summer.
树叶含有叶绿素，所以在春夏两季看起来是绿色的。
When autumn arrives, the chlorophyll in the leaves slowly disappears.
秋天来临时，树叶中的叶绿素会慢慢消失。
chlorophyll 为不可数名词，谓语动词用第三人称单数形式。
Chlorophyll absorbs red and blue light.
叶绿素吸收红光和蓝光。
使用定冠词 the 特指某处存在的叶绿素。
The chlorophyll in seaweed is masked by other pigments.
海藻中的叶绿素被其他色素掩盖。
被动结构常用于科普描述，强调存在位置。
Chlorophyll is found in the leaves of most plants.
大多数植物的叶子中都含有叶绿素。
Not this
How many chlorophyll does this plant have?
Use this
How much chlorophyll does this plant have?
chlorophyll 是不可数名词，不能用 many 修饰，应使用 much。
Not this
Chlorophyll plants are green.
Use this
Plants with chlorophyll are green.
chlorophyll 是名词，不能直接作定语修饰 plants；表示“含有叶绿素的植物”应用 with 或定语从句。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
叶绿素含量
The chlorophyll content of the leaves decreases in autumn.
秋天树叶的叶绿素含量会下降。
叶绿素合成
Light is required for chlorophyll synthesis in plants.
植物合成叶绿素需要光照。
叶绿素分子
A chlorophyll molecule absorbs light energy.
叶绿素分子吸收光能。
叶绿素荧光
Chlorophyll fluorescence is used to measure plant stress.
叶绿素荧光用于测量植物的胁迫程度。
叶绿素分解
Chlorophyll breakdown causes leaves to change color in autumn.
叶绿素分解使树叶在秋天变色。
叶绿素？更像是波若叶！（网络搞笑梗）
The leaves are green because they contain chlorophyll.
叶子是绿色的，因为它们含有叶绿素。
Use chlorophyll naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 chloro-想成“绿”（氯气 chlorine 是黄绿色），phyll 像 leaf（叶），绿叶里就有叶绿素。
语域：neutral 常见场景：生物学教材、科普文章、日常谈论植物时 “叶绿素”是生物学中的常用普通术语，多用于科普和教材，也出现在日常语境中，整体语气偏中性。
No listed word is a true rhyme with chlorophyll, because its final syllable /fɪl/ is unstressed. The chlor- words share chlorophyll's initial /klɔr/ but have different following vowels and endings; fill and philharmonic contain the same /fɪl/ sound as chlorophyll's ending, but their stress patterns do not match, so they are useful lookalikes rather than rhymes.
Dictionary facts from ECDICT, WIKTIONARY.