Matroid
矩阵胚, 拟阵
🗣️ 情景例句
the places they visit, and the landmarks.
他们所去的地方， 以及地标等等。
Excuse me, how can I get to the bus station?
对不起，汽车站怎么走？
One night, however, feeling cold and lonely,
可是，有一天夜里，我感到又冷又孤单，