Katalyst
n. [化] (=catalyst)催化剂
🗣️ 情景例句
I do care.
我真的关心。
Every why has a wherefore.
事出有因。
He informed the station at once, but no one there was able to explain the mystery.
他马上把情况报告了该基地，但那里的人没有一个能解释这到底是怎么回事。