Permutoid
[化]交换体
🗣️ 情景例句
My family just bought a dog, it's no bad, Just a little messy I think.
我家刚刚买了一只狗，还算不错，只是有点脏而已。
Come to me if you're in any difficulty.
有困难来找我。
What did you write on it?
你在贺卡上写了什么？