我个人倾向于将所有的数据访问逻辑封装到这个类中。
Personally I like the idea of keeping all the data access logic encapsulated in that class.
这些数据，当挖掘后，倾向于集中于某些特定年龄组和特定颜色周围，方便用户快速判断该数据内的模式。
The data, when mined, will tend to cluster around certain age groups and certain colors, allowing the user to quickly determine patterns in the data.
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