标签：Spiders and Silk 相关文章

英语听力文摘 English Digest 535、蚕丝生产的秘密你知多少？

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

发表于:2018-12-31 / 阅读(64) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 23、1500年以前,丝绸的生产是中国的国家机密

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

发表于:2019-01-26 / 阅读(99) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 421、植皮有新招

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.

发表于:2019-02-16 / 阅读(78) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 350、史上最强天然纤维

Silk 蚕丝 Silk is the strongest natural fiber in the world, as far as we know. Scientists long to understand just how exactly the silkworm manages the process of silk weaving, so they can replicate the process in order to manufacture such things as

发表于:2019-02-24 / 阅读(89) / 评论(0) 分类 英语听力文摘 English Digest
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