单词:refraction seismology
折射地震学
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The Blurry World Underwater When you open your eyes underwater, things look blurry, but with goggles, everything looks perfectly clear. Why cant we landlubbers focus underwater without goggles? First, we need to explore how our eyes focus when were h
发表于:2018-12-31 / 阅读(91) / 评论(0)
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