嘉宾:Debbie Mason 话题:Moths 英国人的妖蛾子之患 单词拼写: 1、Species:type 2、Declining:going down (health or traffic) 3、Pollinators:the insects plant to flowers 4、Spectacular:magnificient 5、Morph: to change ,t

发表于:2018-12-27 / 阅读(50) / 评论(0) 分类 聆听悦耳英音

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

发表于:2018-12-28 / 阅读(59) / 评论(0) 分类 初学者听力文摘精选

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

发表于:2018-12-31 / 阅读(26) / 评论(0) 分类 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

发表于:2018-12-31 / 阅读(25) / 评论(0) 分类 英语听力文摘 English Digest

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(50) / 评论(0) 分类 英语听力文摘 English Digest

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(34) / 评论(0) 分类 英语听力文摘 English Digest