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catalyst

英 ['kæt(ə)lɪst] 美['kætəlɪst]
  • n. [物化] 催化剂;刺激因素

英英释意


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