Existence theorem
[计] 存在性定理
🧩 词语组成解析
🗣️ 情景例句
How can you do business with the americans? You'll need to improve your English first.
你怎么能与美国人做生意？你得先提高自己的英文水平。
If you dance you must pay the fiddler.
要想寻欢作乐，代价非付不可。
They had got away with thousands of pounds worth of diamonds.
他们已带着价值数千镑的首饰逃之夭夭了。