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

• 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。
• They then examined their arteries for arterial stiffness, often a precursor to high blood pressure and heart disease.
  然后研究者检查了被测试着的动脉硬化情况。动脉硬化是高血压和心脏疾病的前兆。
• 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。
• 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。
• But whether scientific cooperation can become a precursor for political collaboration is less evident.
  但是科学合作是否能成为政治合作的一个先兆，这并不明显。
• 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。
• 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 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。
• 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。
• 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。