Submatrix
[计] 子矩阵
🗣️ 情景例句
and check on your mother and the baby.
问问你母亲和孩子的情况 。
Big mouthfuls ofter choke.
贪多嚼不烂。
His engine failed and he landed on the sea for the second time.
这次他又遭厄运，因引擎故障第二次降落在海面上。