catalyst

英 [ˈkætəlɪst]

美 [ˈkætəlɪst]

n.  催化剂; 促使变化的人; 引发变化的因素

复数：catalysts　

CET6TOEFLIELTSGRETEM4TEM8计算机

Collins.1 / BNC.8852 / COCA.7915

牛津词典

noun

• 催化剂
  a substance that makes a chemical reaction happen faster without being changed itself
• 促使变化的人；引发变化的因素
  a person or thing that causes a change
  1. I see my role as being a catalyst for change.
     我认为我的角色是促成变革。

柯林斯词典

• N-COUNT 催化剂;诱因;诱导者
  You can describe a person or thing that causes a change or event to happen as acatalyst.
  1. I very much hope that this case will prove to be a catalyst for change...
     我非常希望这起事件能催生变革。
  2. He said he saw the bank's role as a catalyst to encourage foreign direct investment.
     他说，他认为银行就应该起到刺激外国直接投资的作用。
• (化学)催化剂
  In chemistry, acatalystis a substance that causes a chemical reaction to take place more quickly.

英英释义

noun

• something that causes an important event to happen
  1. the invasion acted as a catalyst to unite the country
• (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
  Synonym:accelerator

双语例句

• With more active catalyst, the reaction was carried out completely.
  由于使用了活性较大的催化剂，反应进行地很彻底。
• Dichloropropanol was synthesized by chlorination of glycerol with hydrogen chloride under catalysis of organic acids and self-made inorganic catalyst.
  以甘油为原料，氯化氢气体为氯化剂，分别在自制无机催化剂和有机酸的催化作用下制取了二氯丙醇。
• Isoamyl butyrate was synthesized from butyric acid and isoamyl catalyzed by composite solid acid as the catalyst.
  用丁酸和异戊醇为原料，复合固体酸为催化剂合成了丁酸异戊酯。
• In-situ thermal degrdn. of a com. dehydrogenation catalyst in a fixed-bed reactor is studied exptl.
  用实验研究了在固定床式反应器中一种普通脱氢用催化剂的实时热降解。
• The effects of catalyst and solvent on the reaction were studied.
  探讨了催化剂、反应溶剂等对反应的影响。
• The Development and Application of Production Control System for Catalyst
  催化剂生产管理系统的开发和应用研究
• Phase transfer catalyst was used for synthesis of citral diethyl acetal, the yield has increased.
  用相转移催化合成了柠檬醛二乙缩醛，提高了产率。
• He said he saw the bank's role as a catalyst to encourage foreign direct investment.
  他说，他认为银行就应该起到刺激外国直接投资的作用。
• Latest advances and developing trend in copper-based CO low temperature shift catalyst are reviewed in this paper.
  本文详细介绍了铜基一氧化碳低温变换催化剂近几年来的发展概况和发展趋势。
• Synthesis of allantoin from glyoxylic acid and urea using ion exchange resins as catalyst was investigated.
  对三种阳离子交换树脂在乙醛酸与尿素缩合反应中的催化活性进行了研究。