Submatrix
[计] 子矩阵
🗣️ 情景例句
Those are the rules and regulations, and we have to abide by them.
这些就是这儿的规矩， 大家都应该遵守。
How many sisters and brothers do you have?
你有几个姊妹和兄弟？
Party? What party?
聚会？什么聚会？