Central moment
[计] 中心矩
🧩 词语组成解析
🗣️ 情景例句
Forget it, accidents happen.
算了吧， 什么都会发生。
We pitied the family in their sudden unhappiness.
那家人遭受突然的不幸，我们深感同情。
They also have the disadvantage of being an expensive form of transport.
飞机另一个缺点是昂贵。