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 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。
• 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。
• 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。
• 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。
• Research situation of synthesis methanol catalyst abroad& at home was introduced;
  介绍了国内外合成甲醇催化剂的研究情况；
• Butyraldehyde glycol acetal was synthesized from butyraldehyde and glycol by using iodine as catalyst.
  以单质碘为催化剂，通过丁醛和乙二醇反应合成了丁醛乙二醇缩醛。
• The supported catalyst was systematically optimized with respect to catalyst dosage and calcination temperature.
  实验了催化剂的负载量和煅烧温度对催化剂活性的影响。
• Mechanical test results must be evaluated In conjunction with catalyst activity, selectivity, and stability data.
  必须将机械测试结果和催化剂活性、选择性和稳定性数据联系起来进行综合评价。
• 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。