更有用的是，你可以选择世界银行定义的区域，进而察看几组国家的变化或者和其他区域作对比。
More usefully, you can select regions, as defined by the World Bank, and see how groups of countries have changed or compare with other regions.
图片定义的区域在图片尺寸变化的时候可以被拉伸或重复。
Defined areas of an image can be stretched or repeated when an image dimension changes.
图片定义的区域在图片尺寸变化的时候可以被拉伸或重复。
Defined areas of an image can be stretched or repeated when an image dimension changes.
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