Semidefinite
[计] 半定的
🗣️ 情景例句
My pleasure, Malcolm.
我也很荣幸， Malcolm。
How much is a one-way ticket to Beijing?
一张到北京的单程票要多少钱？
when the plane suddenly turned round and flew back to the airport.
这时飞机突然调转头来，飞回了机场。