Combinatorics
n. 组合学,组合数学
🗣️ 情景例句
Do you have any friends in the import or export field?
你有在进出口领域工作的朋友吗？
If you have cows you have to get up early to do the milking.
如果你有奶牛，你不得不早起挤奶。
See you. Bye.
到时候见。再见。