Matroid
矩阵胚, 拟阵
🗣️ 情景例句
Easy does it, tom. don't get all worked up.
冷静点，汤姆，不要太激动。
Can you give me a hand?
你能帮个忙吗？
It's time I went and picked up my little girl from school.
我该去学校接我的小女儿了。