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给你一根足够长的尺子，你能测量大海有多深吗？
source link: https://tech.sina.com.cn/d/i/2018-09-25/doc-ihkmwytn9592399.shtml
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来源：科学大院铁扇公主的芭蕉扇能够扇灭火焰山的三昧真火，科研工作者的“声波扇”可以做什么呢？从浩瀚宇宙遥望，地球是一颗美丽的蓝色星球，它表面71%被海洋所覆盖。海洋是一座巨大的资源宝库，蕴藏着丰富的海洋生物、矿物、化学以及动力资源。人们如果
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