Stratified random sampling
[经] 分层随机抽样
🧩 词语组成解析
adj. 任意的;随机的;胡乱的;
n. 随意;偶然的行动;
🗣️ 情景例句
Look in the real-estate section of Sunday's Times.
查一查星期天的 纽约时报 房地产版。
And everything looked so different, compared with things in New York.
与纽约相比,一切都那么不一肃。
It is no use starting late in life to say:
年老的时候说
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