集合类型数据
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set data type 集合类型
set type data
设置类型数据
以上为机器翻译结果，长、整句建议使用 人工翻译 。
This data set, created by shoppers themselves using in-store scanners, records the type of goods bought by various income groups between 1994 and 2005, as well as the prices paid for them.
ECONOMIST: Economics focus
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