Unflatness
不平直度
🗣️ 情景例句
This dictionary is more useful than I expected.
这字典比我所预期的更有用。
He is studying the ecology of ameba.
他在研究阿米巴
No. Two visitors have just arrived and I want to give them something nice to eat.
不是。我家刚来了两位客人，我想煮些好吃的招待他们。