冲动消费是不可取的，所以要提前计划好你这周的菜单，按分量列好购物清单。
Impulsive spending isn't an option, so plan your week's menu in advance, making shopping lists for your ingredients in their exact quantities.
主成分分析使用属性之间的相关性实现按列压缩。
The principal component analysis implements the column-wise compression, using the correlation between attributes.
为获得这样的信息，DB 2假定列中的值是按升序排列的，并根据正则行间隔确定相应的值。
To get this information, DB2 assumes an ascending sort order of a column's values and determines in regular row intervals the corresponding values.
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