Density operator
[化] 密度算符
🧩 词语组成解析
🗣️ 情景例句
Anything to drink?
要喝点什么吗？
Who bought that new house down the street from you?
谁挨着你的那条街买了那幢新房子？
My aunt, Mrs flower, died three weeks ago.
我的伯母弗劳尔夫人3周前去世。