Matroid
矩阵胚, 拟阵
🗣️ 情景例句
I enjoy camping.
我喜欢露营。
Waste of time is the most extravagant and costly of all expenses.
浪费时间是一切花费中最奢侈豪华的费用。
'We're going back now,' said the conductor.
“我们现在要返回去，”售票员说。