In the world, more than 30% of schools do not provide safe drinking water for about 570 million children.
在世界上，超过30%的学校无法为大约5.7亿的儿童提供安全的饮用水。
Those planning a trip to remote areas, or intending to live in countries where drinking water is not readily available, should know about the various possible methods for making water safe.
那些计划去偏远地区旅行、或在饮用水不现成的国家居住的人，应该知道如何使水适于饮用的各种办法。
Those planning a trip to remote areas, or intending to live in countries where drinking water is not readily available, should know about the various possible methods for making water safe.
那些计划去偏远地区旅行、或在饮用水不现成的国家居住的人，应该知道如何使水适于饮用的各种办法。
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