precursor是什么意思？

precursor

英[pri:ˈkɜ:sə(r)] 美[priˈkɜrsə(r)]

• n. 前辈，前驱，先锋，前任，预兆，先兆，初期形式，[核]前驱波，初级粒子，预报器；

复数：precursors;

例句

• Error is often the precursor of what is correct,but conceit is the prelude to a fall. 错误往往是正确的先导,骄傲是跌跤的前奏。
• Acini contain a small amount of secretions, but few have amyloid precursor. 腺泡内含有少量分泌物, 但很少有淀粉样体.
• Error is often the precursor of what is correct, but conceit is the prelude to a fall. 错误往往是正确的先导, 骄傲是跌跤的前奏.
• 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。
• Error is often the precursor of what is correct. 错误常常是正确的先导.
• 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.
• The precursor and powder were characterized by XRD 、 DTA 、 ICP 、 TEM 、 BET. 采用XRD、DTA、ICP、TEM、BET等 手段表征了前驱体和产物的特征.
• The measurement indicates that the optimized performance can be achieved by three - element composite columbite precursor methods. 性能测试结果表明,三组元复合先驱体法制成样品的性能最佳.
• 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.
• ARJ 21 is seen as the precursor to a jumbo jet. ARJ21型飞机被看作是大型喷气式飞机的前身.

柯林斯高阶英汉双解学习词典释义

• N-COUNT
  先驱；先锋；前身
  A precursor of something is a similar thing that happened or existed before it, often something which led to the existence or development of that thing.
  例句
  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。

英汉词典释义

• n.
  先驱,先锋,前身;先行者;先兆,前兆
  Error is often the precursor of what is correct,but conceit is the prelude to a fall. 错误往往是正确的先导,骄傲是跌跤的前奏。

英英词典释义

• Noun
  1. a substance from which another substance is formed (especially by a metabolic reaction)
  2. a person who goes before or announces the coming of another
  3. an indication of the approach of something or someone

行业词典

• 体育： 前体物；
  化学： 母体；
  化工： 前体；
  医学： 先质，前体：发生在前面的事物。在生物过程中指能生成通常更活泼或更成熟的另一种物质的物质。在临床医学中指能预示另一种症状或体征的症状或体征；先质细胞前体细胞；
  土木工程： 先质；
  地球物理学： 前兆；
  法律： 前任；
  物理学： 前驱核；
  生物化学： 前体；
  石油： 前身物；