Semidefinite matrix
[计] 半定矩阵
🧩 词语组成解析
[计] 半定的
🗣️ 情景例句
and I stayed out an extra half hour.
我还特别多待了半个小时。
Action speak louder than words.
事实胜于雄辩。
As long as all was still, the pen drew a straight line,
只要一切都是静止的，笔就会划出一条直线；