Coboundary operator
[计] 边缘算子
🧩 词语组成解析
[计] 上边缘
🗣️ 情景例句
Here are the X-rays you wanted, Dr. Stewart.
这是你要的X光片，Stewart医师。
It's a piece of cake.
这很容易。
Haven't you heard of him? He's a very famous singer. He's singing at the New Theatre on Saturday.
你没听说过他吗？他是个著名歌手。他星期六将在新剧院演出。