Katalyst
n. [化] (=catalyst)催化剂
🗣️ 情景例句
There is not a shadow of a doubt that they did it.
毫无疑问，是他们干的。
You have your choice of three flavors of ice cream.
你有3种风味的冰淇淋可选择。
If you have any comment about these clauses, do not hesitate to make.
对这些条款有何意见，请尽管提，不必客气。