The site also has world maps that show the levels of availability of safe drinking water from country to country. Users can compare information from 1970 and 2002.
网站还提供显示各国安全饮用水级别的世界地图，决策者可对比查阅1970年至2002年有关安全饮用水的信息。
As a ship captain and skilled 23 cartographer, he filled in many gaps on world maps.
作为一名船长和经验丰富的绘图师，他为世界地图填补了很多空白。
As a ship captain and skilled 23 cartographer, he filled in many gaps on world maps.
作为一名船长和经验丰富的绘图师，他为世界地图填补了很多空白。
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