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"