Semidefinite operator
[计] 半定算子
🧩 词语组成解析
[计] 半定的
🗣️ 情景例句
He is on another line right now.
他正在接另一个电话。
You're likely to see a cheerful message or two hanging on the wall.
很有可能会看到一两条挂在墙上的格言。
Mathilde! I didn't know. I'm sorry. But what happened?
玛蒂尔德！我还不知道这些情况哩。我真难过。但是，这是怎么回事呢？