Betti number
[计] 贝蒂数
🧩 词语组成解析
[计] 贝蒂
🗣️ 情景例句
we need to have our own place to live.
我们应该有自己的房子。
It is my job to introduce the foreign guests who will be spending the week with us here.
我的责任是介绍这些将与我们共度这一周的外国客人们。
Yes, it is. Hi, Jim!
是的，我是。你好，吉姆！