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。 - Cyanide can serve as precursor for the amide nitrogen of asparagine.
***可以作一个天门冬酰胺的酰胺氮前体。 - 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。 - An amino acid that is essential for growth and normal metabolism; a precursor of niacin.
生长和正常的新陈代谢所必需的氨基酸，烟酸的前体。 - Papain-catalyzed synthesis of aspartame precursor z-apm in biphasic solvent system wasinvestigated.
本文报道在两相溶剂体系中利用木瓜蛋白酶催化合成aspartame前体z－apm的研究。 - Based on studies of precursor events and unusual animal behavior, a warning was issued by local authorities.
当地政府根据震前先兆与动物的反常行为，发出了地震预警。 - 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。 - 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。 - In plant cells the principal precursor of alanine, as well as leucine and valine, is pyruvate.
植树细胞中丙氨酸和亮氨酸、缬氨酸的主要前体是丙酮酸。 - Objective To study the effect of gypenosides on proliferation of neural precursor cells in vitro.
目的探讨不同浓度绞股蓝皂苷对体外培养的神经前体细胞增殖能力的影响。