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

• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• This study provided a precursor of N-propionyl-D-mannosamine for the tumor-associated carbohydrate antigen.
  为肿瘤相关糖抗原提供了N-丙酰甘露糖胺前体。
• 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。