Katalyst
n. [化] (=catalyst)催化剂
🗣️ 情景例句
Fast asleep.
正熟睡着呢。
Why does only one sock get lost at a time?
为什么袜子只丢了一只呢？
Fine. I'll start the paperwork for your order right away.
好啊，那我立刻就为你们的订单作准备了。