单词：(of a silkworm) molt to go through the chrysalis state
单词：(of a silkworm) molt to go through the chrysalis state 相关文章
Cicadas Swarm Wide Portions of US The cicadas are back. Over the past few weeks, across a wide swath of the eastern United States, the notoriously noisy bugs have emerged by the billions from their long, underground adolescence. On a muggy afternoon
VOA标准英语2011年(六月)
Fifteen hundred years ago in China, silk production was a state secret. The silk trade was so valuable that anyone who tried to take silkworm eggs or mulberry seeds out of China was put to death. Then in 552 AD, two monks smuggled silkworm eggs to Co
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English-Only Coding Program Seeks Change in Japan Code Chrysalis offers a computer coding training program in Tokyo. Kani Munidasa is the companys chief. He used to be based in Silicon Valley in California a place where many of the worlds biggest tec
2018年VOA慢速英语(七)月
This is Scientific American's 60-second Science. I'm Karen Hopkin. This will just take a minute. If you were a bird, how big could you be? Well, an ostrich can weigh 400 poundsbut it cant get off the ground. So what if you want to fly? University of
Scientific American(六)月
Molting Molds Flying Bird Size Limit A study in the journal Public Library of Science Biology finds that it's the rate at which flying birds can replace their flight feathers that determines how big they can grow and still get off the ground. Karen
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