Mean of random variable
[化] 期望值
🧩 词语组成解析
mean
[min]
v. 表示…的意思;意思是;打算;产生…结果;
adj. 吝啬的;刻薄的;破旧的;残忍的;
n. 平均数;中间;几何平均;等比中数;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
random
['rændəm]
adj. 任意的;随机的;胡乱的;
n. 随意;偶然的行动;
🗣️ 情景例句
Millie, did you bring the tapes for dancing?
Millie，带来了跳舞的录音带吗？
Would you be so kind as to lend me some money?
你能借我一点儿钱吗？
One day, he walked into an expensive shop after having been caught in a particularly heavy shower.
一天，他遇上一场瓢泼大雨，淋得透湿。