单词：radial refraction
径向折射
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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(129) / 评论(0)
英语听力文摘 English Digest
英语听力文摘 English Digest
DAVID GREENE, HOST: This week, we have been exploring the realities of modern work. A new NPR/Marist poll found a lot of confidence in the future among American workers. A vast majority said they actually don't feel that threatened by the economic fo
发表于:2019-01-16 / 阅读(130) / 评论(0)
2018年NPR美国国家公共电台1月
2018年NPR美国国家公共电台1月