标签：蚕丝 相关文章
When we eat our meals we almost always do so indoors, where we can see no one else and no one else can see us. 我们就餐几乎总在室内，我们看不到别人，别人也看不到我们。 But the French often eat outof- doors, on the sidewalk
美国学生世界地理教材
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
菲奥伦佐奥梅内托分享了20多种惊人的丝的用法，丝作为自然中最典雅的材料之一--能传输光线，改善可持续行，增强强度和制作药物和骨骼。台上，他展示了很多极其有趣的丝质物件。
TED公开课:生态谜云
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
英语听力文摘 English Digest