Katalyst
n. [化] (=catalyst)催化剂
🗣️ 情景例句
She's a smart young lady, and very nice.
她是个聪明的年轻姑娘 而且很善良。
Do you think you'll be able to go to sleep right away?
你认为你将马上入睡吗？
And here's a little present for you.
这里有一件小礼物送你。