Statistical operator
[化] 统计算符; 统计矩阵
🧩 词语组成解析
🗣️ 情景例句
before the guests arrive.
在客人到达之前。
Fair faces need no paint.
貌美毋须修饰。
In 1929, three years after his flight over the North Pole, the American explorer, R.E.Byrd, successfully flew over the South Pole for the first time.
美国探险家 R。伯德在飞越北极3年之后，于1929年第一次飞越了南极。