Replacement problem
[计] 置换问题
🧩 词语组成解析
🗣️ 情景例句
Most of the building in this town are rather unattractive, but this church is an exception.
这个城市中大部分建筑都不太好看，但这座教堂是个例外。
You cannot break the contract without any good reason.
如果没有什么正当理由，你们不应撕毁合同。
He always talks big.
他总是吹牛。