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precursor of [noun]
表示“...的前体”，常用于化学或生物语境。
This amino acid is a precursor of serotonin.
这种氨基酸是血清素的前体。
先驱；前身；先兆
precursors — plural of precursor
先理解核心含义，再看它在真实句子里的用法。
先驱；前身；先兆
A person or thing that comes before someone or something and signals what is to follow; a forerunner.
This amino acid is a precursor of serotonin.
这种氨基酸是血清素的前体。
预示者:先驱、前任或即将发生事件的预兆。
That which precurses: a forerunner, predecessor, or indicator of approaching events.
形成另一种物质的物质(尤指通过代谢反应)
a substance from which another substance is formed (especially by a metabolic reaction)
参与化学反应生成另一种化合物的化合物之一。
One of the compounds that participates in the chemical reaction that produces another compound.
走在他人前面或宣告他人到来的人
a person who goes before or announces the coming of another
The amino acid tyrosine is a precursor for the neurotransmitter dopamine.
氨基酸酪氨酸是神经递质多巴胺的前体。
In the laboratory, we mixed the precursor compounds and heated them to produce the final product.
在实验室里，我们混合了前体化合物并加热以制得最终产物。
Cholesterol serves as a precursor for several important hormones.
胆固醇是多种重要激素的前体。
表示“...的前体”，常用于化学或生物语境。
This amino acid is a precursor of serotonin.
这种氨基酸是血清素的前体。
表示“...的前身”，强调转化关系。
Cholesterol is a precursor to many hormones.
胆固醇是许多激素的前体。
表示“作为...的前体”，常用于合成或制备过程。
The compound serves as a precursor for the drug.
该化合物作为药物的前体。
Not this
This discovery precursors many advances.
Use this
This discovery is a precursor to many advances.
precursor是名词，不能用作动词。应使用系表结构，后接介词to表示'...的前身'。
Not this
This concept is a precursor of modern theory.
Use this
This concept is a precursor to modern theory.
precursor后接介词to表示'...的前身'，而非of。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
……的前身/先兆
The small protest was a precursor to the larger uprising.
这次小规模抗议是更大规模起义的先兆。
化学前体
The researchers used a chemical precursor to synthesize the compound.
研究人员使用一种化学前体来合成该化合物。
直接前身
This early model was the direct precursor of the modern computer.
这个早期型号是现代计算机的直接前身。
代谢前体
Cholesterol is a metabolic precursor for steroid hormones.
胆固醇是类固醇激素的代谢前体。
历史先驱
Ancient Greek democracy is often seen as a historical precursor to modern democracy.
古希腊民主常被视为现代民主的历史先驱。
蛋白质前体
Insulin is first made as a protein precursor called proinsulin.
胰岛素首先以称为胰岛素原的蛋白质前体形式生成。
Use precursors naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
pre（前）+cursor（跑者）→ 跑在前面的人/物，联想成“先驱、前兆”，记住词根是“在前面跑”。
语域：formal 常见场景：学术或科技文本、正式演讲与写作 precursor 多用于正式语境，表示“先驱”“前身”或“前体”。日常口语中较少出现，在学术、科技或文学作品中比较常见。选用时注意语境正式度。
可数名词，常与介词to连用表示'...的前身'
Dictionary facts from ECDICT, WIKTIONARY.