Monoid
[计] 独异点; 类群
🗣️ 情景例句
I understand.
我能了解。
Excuse me I couldn't tell you beforehand.
对不起我不能事先告诉你。
What's that? asked Lucy. She pointed at a strange thing with three legs and a strange top. It was made of metal.
“那是什么？”露西说。露西指着一个有三条腿和一个奇怪的顶部的怪怪的东西问。是用金属造的。