Chemex
化学交换(同位素浓缩)过程
🗣️ 情景例句
I really appreciate
我真的很感谢
What is your guess about the outcome of this meeting?
你认为这项会议的结果将会如何呢？
The bison skins were sent by rail to cities to be sold.
野牛皮用火车运到城里出售。