Katalyst
n. [化] (=catalyst)催化剂
🗣️ 情景例句
And when I see an opportunity,
而且当我一看到机会，
Just forget about it.I never did like it anyway.
别把这件事放在心上。我本来就不喜欢这桌布。
No littering on the campus.
在校园内不准乱丢废物。