数据的数字世界和我们所处的自然环境之间有一个相似之处，劣质的数据就像是一堆垃圾：遍布于环境中的污染物。
There's a fitting analogy between the digital world of data and the physical environment we live in. Bad data is like trash: pollutants that infest the environment.
对它们来说，这些仔细过滤后充入了二氧化碳的水流是维系呼吸、赖以生存的依靠。 而这些鱼在大自然中的家园――美国东南部的河流已经被大坝阻断奔腾的脚步，又因为污染物遍布而让它们无法栖身。
For them the carefully filtered, aerated wateroffers the breath of life, whereas their natural homes—streams andrivers in the southeastern United States—are choked by dams and cloudedwith pollutants.
“把自然和技术结合起来能够增强植物清除空气污染物的效力，”他说。”
"Combining nature with technology can increase the effectiveness of plants in removing air pollutants, " he said.
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