Indefinite matrix
[计] 不定矩阵
🧩 词语组成解析
🗣️ 情景例句
She does the housework, is that right?
她专门干家务，对吗？
What is thelargest industrial center in this country?
这个国家最大的工业区是哪里？
I often go-swimming, sometimes in a lake near my home, and sometimes in the river.
我经常去游泳，有时在我家附近的湖里，有时在河里。