Jellison. 'I liken it to returning to an old flame. Is it really a good idea?

杰利森说，这就像重回老情人身边，这真是个好主意吗？

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“BSFs were developed in the 1980s, ” says Jellison. “This is the most comprehensive study to date to characterize the efficiency of different filter types.”

“八十年代开发了生物沙子饮用水过滤系统”，杰利森说，“这是迄今为止全面研究不同效率的饮水系统的特点。”

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"Smaller, lighter BSFs," says Jellison, an associate professor of civil and environmental engineering, "would be cheaper, easier to transport and available to a broader global market."

杰里森，一个城市和环境工程学的副教授说：“一个更小，更轻的净水器，而且必须要更加的便宜，更容易运输，可以被广大的市场所接受。”

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"Smaller, lighter BSFs," says Jellison, an associate professor of civil and environmental engineering, "would be cheaper, easier to transport and available to a broader global market."

杰里森，一个城市和环境工程学的副教授说：“一个更小，更轻的净水器，而且必须要更加的便宜，更容易运输，可以被广大的市场所接受。”

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