Demorgan's theorem
[计] 真根定理, 反演定理, 德摩根定理
🧩 词语组成解析
🗣️ 情景例句
Come in, come in. Please, come in.
请进， 请进。请进来。
Do you work near the library?
你在图书馆附近工作吗？
'Can I return these two tickets?' he asked.
“我可以退掉这两张票吗？”他问。