Iec
[化] 离子交换色谱法
🗣️ 情景例句
I have to sign copies of my book for a lot of people
我还必须为许多人在我的书上签名
You're big and fat, and I'm little and skinny.
你虽然大而胖，但我却小而瘦。
What's the time?
几点了？