单词:mean refraction
平均大气折光差;平均折射
单词:mean refraction 相关文章
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(151) / 评论(0)
英语听力文摘 English Digest