Aotocatalyst
[医] 自动催化剂
🗣️ 情景例句
Are there any tours for the Grand Canyon?
有到大峡谷的旅游团吗？
He comes bothering me day after day.
他每天都跑来打扰我。
Excuse me. May I have a piece of paper, please?
请问，我可以要一张纸吗？