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estrogen + be + [noun phrase]
estrogen 作物质名词时通常不可数，谓语动词用单数；也可用复数 estrogens 指多种雌激素。
Estrogen is a sex hormone.
雌激素是一种性激素。
雌激素
先理解核心含义，再看它在真实句子里的用法。
雌激素
A female steroid sex hormone secreted by the ovary that is responsible for typical female sexual characteristics.
Estrogen is a sex hormone.
雌激素是一种性激素。
卵巢分泌的一组类固醇,作为雌性激素发挥作用。
Any of a group of steroids that are secreted by the ovaries and function as female sex hormones.
卵巢分泌的雌性甾体性激素的统称,决定女性典型性征
a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics
The doctor explained that estrogen helps regulate the menstrual cycle.
医生解释说，雌激素有助于调节月经周期。
During menopause, a woman's estrogen levels gradually decrease.
更年期期间，女性的雌激素水平会逐渐下降。
Some foods contain plant compounds that act like estrogen in the body.
有些食物含有在体内作用类似雌激素的植物化合物。
estrogen 作物质名词时通常不可数，谓语动词用单数；也可用复数 estrogens 指多种雌激素。
Estrogen is a sex hormone.
雌激素是一种性激素。
被动语态中用 by 引出分泌者。
Estrogen is secreted by the ovary.
雌激素由卵巢分泌。
responsible for 后接名词或名词短语，表示“导致、是……的原因”。
Estrogen is responsible for the development of female characteristics.
雌激素对女性特征的发育负责。
Not this
Estrogenic level decreases after menopause.
Use this
Estrogen level decreases after menopause.
汉语说'雌激素水平'，但英语中修饰 level 用名词 estrogen 作定语，不能用形容词 estrogenic。estrogenic 意为'与雌激素作用有关的'，改成 estrogen 后意思才是'雌激素水平'。
Not this
An estrogen is a female hormone produced by the ovaries.
Use this
Estrogen is a female hormone produced by the ovaries.
estrogen 指这类激素时是不可数名词，泛指时不用冠词。An estrogen 意为'一种雌激素'，会把句子变成指其中一种亚型，所以需去掉 an。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
雌激素水平
The doctor checked her estrogen levels during the blood test.
医生在血液检查中检查了她的雌激素水平。
雌激素替代疗法
Many women consider estrogen replacement therapy after menopause.
许多女性在绝经后会考虑雌激素替代疗法。
雌激素生成
The ovaries are the main site of estrogen production.
卵巢是雌激素生成的主要部位。
雌激素受体
Some breast cancers are driven by the estrogen receptor.
一些乳腺癌由雌激素受体驱动。
雌激素优势
Estrogen dominance may contribute to certain health issues.
雌激素优势可能导致某些健康问题。
雌激素缺乏
Estrogen deficiency can cause symptoms like hot flashes.
雌激素缺乏会导致潮热等症状。
这个人的雌激素可真强。
When his sister started crying at a dog food commercial, he teased, "The estrogen is strong in this one."
他妹妹看狗粮广告哭起来时，他打趣道：“这个人的雌激素可真强。”
雌激素可真是个猛药。
As the estrogen therapy made her emotional, she joked, "Estrogen is a hell of a drug."
雌激素疗法让她情绪激动时，她自嘲道：“雌激素可真是个猛药。”
Use estrogen naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想 estro- 像 estrus（雌性发情期），-gen 是‘产生’，合起来就是雌激素。
语域：neutral 常见场景：medical consultations、biology textbooks、health articles 这是指雌性激素的标准科学术语，通常用于医学检查、生物教材和健康科普中；日常谈论身体状况时也比较常见，整体语气正式但不生僻。
No common English word fully rhymes with estrogen (/ˈɛstrədʒən/). These -gen words look similar and share the final /dʒən/ syllable, but they are not rhymes: each has a different stressed vowel (hydrogen /ˈhaɪdrədʒən/, oxygen /ˈɑːksɪdʒən/, nitrogen /ˈnaɪtrədʒən/, pathogen /ˈpæθədʒən/).
Dictionary facts from ECDICT, WIKTIONARY.