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master sample
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busin.
母样本
demogr.
人口普查的
标准样本
interntl.trade.
标准样品
math.
主样本
oil
标准试样
sociol.
主要样本
stat.
标准样本
tech.
主样品
master sample
:
2 phrases
in 2 subjects
Chemistry
1
Textile industry
1
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