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
The wedding dress. And something blue.
结婚礼服。蓝色的东西。
What shall I send him for his Christmas?
我要送他什么东西作为圣诞礼物？
Last week No.14 Middle School held a sports meeting on the playground.
上星期第十四中学在操场举行了一次运动会。