Nilmanifold
[数]幂零流形
🗣️ 情景例句
Do you already have a boyfriend?
你已经有男朋友了吗？
I'm going to lend her two cans.
我要借给她两罐。
But this was before Annie Sullivan came to stay.
但是，这都是安妮·莎利文来住下之前的事了。