Matroid
矩阵胚, 拟阵
🗣️ 情景例句
Don't laugh. In the beginner's class,they give you a chance to rest between exercises.
别笑。在初级课程中你有机会休息。
I wonder what makes you unhappy.
我不知道是什么使你不快乐。
We're tired ...
我们累了。。。。。。