Chemex
化学交换(同位素浓缩)过程
🗣️ 情景例句
It's a deal.
一言为定。
The whole book is produced and edited in the pursuit of excellence.
这本书在出版和编辑全过程都力求完美。
OK. Who's first? Ma Lili!
好。第一个是谁？马莉莉！