Iec
[化] 离子交换色谱法
🗣️ 情景例句
OK, I've got one.
好 ，我有了。
I ask him to tell me everything he thought.
我要求他告诉我，他所想得每件事情。
I know. I can help him with most of his subjects.
我知道。我可以帮助他学习绝大多数科目。