单词:ailanthus silkworms
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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
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
Lesson 21 Chicken 1.You chicken! 2.Don't call me chicken. 3.I prefer chicken. 4.I'm no chicken. 5.She's pretty but no chicken. 6.He chickened out because of fear. 7.1000 yuan is chicken-feed to him. 8.Don't count your chickens before they're hatched.
HAVE you ever seen a Persian cat? 你见过波斯猫吗? They are big, beautiful animals with soft thick hair. They come from Persia. 体型较大,非常漂亮,长着又柔又厚的毛,产自波斯。 Persia is one of those once-was or used-t
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.
First things first. 要事第一。 Go by the book. 照章办事。 First come, first served. 先到先得。 Everything has its season. 万物皆有时。 Rules are made to be broken. 规则是用来打破的。 When in Rome, do as the Romans do. 入乡