Underdeterminant
子行列式
🗣️ 情景例句
What's the schedule today?
今天的工作是怎么安排的？
A spot is most seen on the finest cloth.
最清洁的布上，污点特别显眼。
His work starts at half past eight, and finishes at a quarter to five.
30开始工作，4：45下班。