precursor
英 [priˈkɜːsə(r)]
美 [priˈkɜːrsər]
n. 先驱; 先锋; 前身
复数：precursors
Collins.1 / BNC.10361 / COCA.9664
牛津词典
noun
- 先驱；先锋；前身
a person or thing that comes before sb/sth similar and that leads to or influences its development
柯林斯词典
- N-COUNT 先驱；先锋；前身
Aprecursorof something is a similar thing that happened or existed before it, often something which led to the existence or development of that thing.- Real tennis, an ancient precursor of the modern game, originated in the eleventh century...
室内网球，现代网球运动的古老前身，起源于11世纪。 - He said that the deal should not be seen as a precursor to a merger.
他说该笔交易不应该被看作是合并的前兆。
- Real tennis, an ancient precursor of the modern game, originated in the eleventh century...
英英释义
noun
- something that precedes and indicates the approach of something or someone
- a person who goes before or announces the coming of another
- a substance from which another substance is formed (especially by a metabolic reaction)
双语例句
- This is because the active drug ingredient is not dopamine itself but various precursor molecules.
这是因为活性治疗药物成分不是多巴胺本身，而是一些前体药物。 - Provisions on the type, scope, measures and methods for the administration of narcotic drugs, psychotropic drugs and precursor chemicals;
三是规定了麻醉药品、精神药品和易制毒化学品管制的种类、范围、措施和办法。 - The effects of orthophosphoric acid concentration in precursor preparation on the catalyst behavior have been studied.
考察了前驱体制备过程中磷酸含量对催化剂性能的影响。 - It is a precursor of many aromatic compounds and of alkaloids such as curare and morphine.
苯丙氨酸是苯化合物以及像箭毒和***等生物碱的前体。 - Comparing the ratio of testosterone to epitestosterone can then indicate whether testosterone or a precursor has been taken.
因此测定睾酮与表睾酮的比例，能够反映出（运动员）是否服用了睾酮或者它的前体药物。 - Is the precursor of DHA to promote brain development and enhance memory.
的前体，促进脑力发育和增强记忆力。 - Amphetamines is one kind of synthetic compounds whose precursor structure is amphetamine.
***类物质是一大类人工合成的以***为母体的化合物。 - Hobbes is a precursor of modern positivism and analytical jurisprudence.
霍布斯是现代实证主义法学和分析法学的先驱。 - This was a necessary precursor to the development of calculus and a precise quantitative science of physics.
这是一个必要的前体的发展，微积分和精确的定量科学的物理学。 - Exogenously supplied aspartate is not an active precursor of asparagine in plant tissues.
外来供给的天门冬氨酸，在植物组织中并不是一个活跃的天门冬酰胺前体。