蚕是一种昆虫,一种会变的昆虫。它一生要脱六次皮,最后变成蚕蛾。第一次脱皮,也是最艰难的一次脱皮。临近脱皮时,蚕的身体在基因的引导下,变得一动不动,就单单仰着头。过了几个小时,蚕动了,它抽搐了一下,与此同时,原来的头上冒出了一个新的小脑袋。可能是这个新的小脑袋才让蚕如此疼吧。接着,蚕用这个新的头吐出条条晶莹的蚕丝,把这些蚕丝粘在旧皮上,然后一伸一缩地把旧皮一点一点地脱下来。 Silkworm is a kind of insects, a will change insects. Its life to take off six times the skin, and finally become a moth. The first peeling, peeling is the hardest time. Near the peeling, the body of silkworms in the genetic guide, become motionless, just look up. After a few hours, the silkworm moved and it twitched for a moment, while at the same time a new little head appeared on the original head. It may be this new little head that makes silkworms so painful. Then, with this new head of silkworm silk spit out the silk, the silk stick to the old skin, and then stretched to the old skin a little off.