De morgan's theorem
[计] 德摩根定律
🧩 词语组成解析
[化] 非对映体过量\\n[医] 铥(69号元素铥的别名,1916年Eder离得的假想元素)
🗣️ 情景例句
Donald passed away a couple of years ago.
Donald几年前去世了。
We had a fabulous time at the garden party.
我们在游园会上玩得很开心。
I was only five when my father had taken me abroad, and that we eighteen years ago.
我5岁那年，父亲就带我出了国，那是18年前的事了。