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
It was a pretty dumb thing to do.
做那件事真傻。
We don't like them to pass through here.
我们不希望汽车通过这里。
No, more, about 130 years ago. Most of the slave owners were rich farmers who lived in the south. They wanted to keep their slaves.
不，还要早，大约130年前。大多数奴隶主都是住在南方的富有的农场主。他们想保留自己的奴隶。