Thfa
[化] 四氢叶酸
🗣️ 情景例句
How long will it take for my mail to reach its destination?
我的信件到达目的地要多久？
I can't tell.
我说不准。
Thanks. I think we have everything. Thank you for having us.
多谢。我想我们没忘记什么东西。