The Dutch mastered the sea but its reefs paid the price, so this company is printing new ones | CNN

Europe's longest dam has kept the Netherlands from flooding for almost a century, but it wiped out the marine life around it. Now a small Dutch company is 3D printing reefs to restore what was lost.

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欧洲最长的水坝使荷兰免受洪水侵袭近一个世纪，但也摧毁了周围的海洋生物。如今，一家荷兰小公司正在利用3D打印技术制作人工鱼礁，以恢复失去的海洋生态。

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