Submatrix
[计] 子矩阵
🗣️ 情景例句
I need a new supply of razors and shaving cream.
我需要新的剃须刀和剃须膏。
The doctor advised me to get plenty of exercise.
医生劝我要多运动。
However, there is an even more insidious kind of pollution that particularly affects urban areas and invades our daily lives, and that is noise.
但是，还有一种更加隐蔽有害的污染，它专门影响城镇地区，侵袭我们的日常生活，那就是噪音。