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

• The method of preparation of catalyst, compound ratio of activator and catalysis of charcoal active were studied.
  对催化剂的制备方法、活性组分的配比和以活性炭为载体的催化性能进行了考察。
• 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。
• 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。
• Presents the performances and industrial application of TH-1 dehydrogenation catalyst.
  介绍TH-1型脱氢催化剂的性能及工业应用情况。
• 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。
• Suspension bed hydrocracking technology and water soluble catalyst were used for upgrading of atmospheric residue from Dagang oil field.
  采用悬浮床加氢技术和水溶性分散催化剂对大港常压渣油进行了轻质化和改质研究。
• 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。
• 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。
• In this paper, with solid superacid as catalyst for isoamyl propionate synthesis was studied.
  本论文用固体超强酸为催化剂对丙酸异戊酯的合成进行了研究。
• This process relies on a catalyst of high selectivity and week activity.
  这过程所靠的是一种高选择性和低活性的催化剂。