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

• 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。
• 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。
• Cyanide can serve as precursor for the amide nitrogen of asparagine.
  氰化物可以作一个天门冬酰胺的酰胺氮前体。
• The sol-gel coating was prepared with cellulosic fabrics and synthetic fabrics as carriers and TEOS as precursor.
  以纤维素织物和合成纤维织物为载体，以硅酸乙酯（TEOS）为水解前驱体，对织物载体进行溶胶凝胶涂层整理。
• Homology analysis indicated that the protein is identical to the eggshell precursor protein of F.
  同源性分析表明该基因编码蛋白质可能具有肝片吸虫卵壳前体蛋白相似的性质和功能。
• 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。
• 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。
• Amphetamines is one kind of synthetic compounds whose precursor structure is amphetamine.
  苯丙胺类物质是一大类人工合成的以苯丙胺为母体的化合物。
• In this way, it's sort of a precursor to Apple's new GarageBand application.
  这样，它成为苹果公司的新GarageBand应用程序的先驱。
• 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。