Density matrix
[化] 密度矩阵
🧩 词语组成解析
🗣️ 情景例句
I could probably tell what it requires to fix it up.
我大致能说出修复它需要些什么。
What's your nationality? Are you an American.
你的国籍是什么？你是美国人？
He led me into his room and hurriedly hid a large parcel under his desk.
他把我领进屋，慌忙把一个大包藏到了桌子下面。