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
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VOA标准英语2011年(六月)
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原版英语对话1000个
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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单词解析速记
Survival Of The Sluggish Silkworms have been bred over thousands of years to behave quite unlike their caterpillar cousins in the wild. Thats because people purposely breed silkworms to fit this job description: WANTEDSuperlative silk producers. Bene
英语听力文摘 English Digest
Secrets Of Silk Production 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 s
英语听力文摘 English Digest
Todd: OK. Hey, hello! Tim: Hey, how's it going? Todd: Doing pretty good. Could you introduce yourself please? Tim: Yeah, I'm Tim Peterson. I'm from Oregon in the United States. Todd: Oh, nice. You're from Oregon. Tim: Yeah. Todd: OK, and were you bor
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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
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教育与新闻
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英语新闻
The State Department confirmed Friday that Secretary of State Condoleezza Rice will go to the Middle East next week in another effort to advance Palestinian-Israeli peace talks. U.S. officials deny trying to rush the process. VOA's David Gollust rep
VOA标准英语2008年（八月）
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2007年VOA常速英语（十月）
This mass roosting takes place soon after the summer nesting season. Its a chance for the birds to molt before they fly south for the winter. As Vauxs swift numbers reach a peak in mid September, they attract attention from the locals. Coopers hawks
探索与发现2013年
1500年以前，丝绸的生产是中国的国家机密 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
英语听力文摘 English Digest
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
60秒科学
Silkworm s and Skin Graft s Don: One of the neater things thats going on in biology is the genetic modification of species. By changing the instructions in their genes, we can make certain plants and animals produce things that are useful to humans.
英语听力文摘 English Digest
Captain Nemo walked in front, and his companion followed us a few steps to the rear. Conseil and I stayed next to each other, as if daydreaming that through our metal carapaces, a little polite conversation might still be possible! Already I no longe
《海底两万里》中英双语有声读物