precursor

英 [priˈkɜːsə(r)]

美 [priˈkɜːrsər]

n.  先驱; 先锋; 前身

复数：precursors　

TOEFLGRE化学

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.
  1. 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。
  2. 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。

英英释义

noun

• something that precedes and indicates the approach of something or someone
  Synonym:harbingerforerunnerpredecessorherald
• a person who goes before or announces the coming of another
  Synonym:forerunner
• a substance from which another substance is formed (especially by a metabolic reaction)

双语例句

• 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。
• Small cell lung cancer is neuroendocrine neoplasm and origins from apud ( amine precursor uptake decarboxylation) cell.
  小细胞肺癌是神经内分泌肿瘤，起源于apud（胺前体摄取脱羧化）细胞。
• 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。
• This prediction was based on a number of geophysical observations of precursor events as well as abnormal animal behavior.
  除了对地震前兆的地球物理现象观察，这次地震的准确预测还要多亏对动物异常活动的观察。
• They alter the way it cleaves amyloid precursor protein.
  它们改变了这个酶切割淀粉样蛋白前体的方式。
• 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。
• Calcium deposits in the coronary arteries are considered a precursor of future heart disease.
  冠状动脉中的钙沉积是导致人们将来患上心脏病的先兆症状。
• IDOL can even mediate the degradation of the receptor precursor in the endoplasmic reticulum.
  甚至，IDOL能调解内质网中受体前体的降解。