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3It wasn’t the first time that nations at war turned to seaweed. During the First World War, the U.S. relied on the giant kelp seaweed (Macrocystis) to boost production of potash (a fertilizer produced in Germany), gunpowder, and acetone.
，这一点在雷电模拟器官方版本下载中也有详细论述
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How Slovakia became the world's number one carmaker