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菲律宾废弃的菠萝叶子，为什么捡回来回收？这不是多此一举吗？
菲律宾人简直太奇怪了，别人种植菠萝都是收割果肉，他们却把废弃的叶子捡回来回收。菲律宾人为什么要回收废弃的菠萝叶子？他们有什么用处？
不可思议的科普35/71
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