Combinatorics
n. 組合學,組合數(shù)學
??? 情景例句
Do you want a state-of-the-art machine?
你想要臺配置最好的機器嗎？
The sun shines all alike.
太陽同樣地普照一切。
Even if a piped water supply is safe at its source,
既使管道供水系統(tǒng)在水源處是安全的，