Underdeterminant
子行列式
🗣️ 情景例句
Put the tablecloth on the picnic table,
将桌巾布放在野餐桌上，
Sorry to keep you waiting.
抱歉让你久等了。
Oh, by the way, there was a telephone call for you.
啊，顺便说一句，有你一个电话。