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[科学美国人技术系列] 60秒科学:把蛋糕包装袋也吃掉
录音原文Picture an orange. It’s encased in a biodegradable shell—the peel’s even somewhat edible, as marmalade fans can attest. But we humans often package food in plastic, with itsenvir2012-02-17 编辑：beck
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2012-02-17 编辑：beck
