catalyst

Manganese dioxide acts as a catalyst to speed up the decomposition of hydrogen peroxide.

(Chinese) 二氧化锰充当催化剂，加速过氧化氢的分解。

Without a specific chemical catalyst, this industrial reaction would take days to complete.

(Chinese) 如果没有特定的化学催化剂，这个工业反应需要好几天才能完成。

The sudden increase in fuel prices served as a catalyst for the nationwide protests.

(Chinese) 燃料价格的突然上涨成了全国性抗议活动的导火索。

Her encouraging words were the catalyst he needed to finally start his own business.

(Chinese) 她那番鼓励的话语是他最终决定开始创业的催化剂。