Positive definite matrix
[计] 正定矩阵
🧩 词语组成解析
positive
['pɑzətɪv]
adj. 积极的;确实的，肯定的;[数]正的;[医]阳性的;
n. 正面;正片;[语]原级形容词;[数]正量;
posit肯定+ive形容词后缀 → 肯定的；积极的
🗣️ 情景例句
He's a pretty good bloke and he seems very friendly.
他是一个很不错的家伙，看起来也很友善。
Frugality is an estate alone.
仅仅节约就是一笔财产。
The dress doesn't fit her. She is too thin.
这件衣服不适合她，她太瘦了。