单词：annuals silkworm
单词：annuals silkworm 相关文章
Landscaping a Home Mona: I want a lawn. Ive always pictured our new house with a lawn. Kellan: Lawns require a lot of water and upkeep. I think we should use hardscape for most of the yard and plant only drought-tolerant plants. Mona: I dont want my
2015年ESL之日常生活
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
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
英语听力文摘 English Digest
This is the VOA Special English Agriculture Report. Today we harvest some words. We are going to explain some commonly used terms for plants and farm animals. If you miss any, or if you want to test yourself, you can find a transcript and MP3 of our
VOA慢速英语2009年（七）月
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
appologies today for talking about one of my passions: gardening. It's that time again, whoopee! The weather has been perfect recently. Though there is snow on the tops of the nearby mountains, and the breeze is cold, the bright sun makes up for it.
英语博客 A cup of English