Submatrices
(submatrix 的复数) [计] 子矩阵
🗣️ 情景例句
I'd like to buy some stamps for this letter.
我想买这封信的邮票。
I do not know whether you realize it, but this condition is essential to us.
我不知道你是否了解，但是，这个条件对我们是必要的。
Not a sound was heard.
一点声音也没有。