Stratified random sampling
[经] 分层随机抽样
🧩 词语组成解析
a. 分层的；形成阶层的；分为不同等级的
random
['rændəm]
adj. 任意的;随机的;胡乱的;
n. 随意;偶然的行动;
sampling
['sɑ:mpliŋ, 'sæ-]
n. 抽样;取样;（乐曲的）节录;选录;
🗣️ 情景例句
My instructor thought that the beginner's class was too easy for me.
老师认为初级课程对我来说太容易了。
Yes, I do.
是的，我有。
The problem now facing humanity is: What is going to be done with all this knowledge?
用这些知识去做什么？