蚕从小到大,要蜕好几次皮。蚕蜕皮后最大的变化,据我观察,是嘴变得特别大。足有原来的三四倍大。真的,刚蜕皮的蚕,它的“穿”着新皮肤的身子,有时候反比蜕皮前要小一些,但它的新嘴,每一次,都必定比它原来的嘴要大好几倍。所以在我看来,蚕蜕皮的过程,也是换嘴的过程。蚕蜕皮,是因为身子长大了,过去的皮已经成了一种束缚。蚕换嘴呢?是随着自己长大,再用过去的那个小嘴吃桑叶, Silkworms from small to large, to shed several times skin. After the silkworm molt change the biggest change, according to my observation, the mouth becomes particularly large. Three or four times as long as the original. Really, just molting silkworms, its “wearing ” with the body of the new skin, and sometimes inverse than molting before smaller, but its new mouth, each time, must be several times larger than its original mouth . So in my opinion, silkworm molt process, but also the process of mouth change. Silkworm molting is because the body grew up, the skin of the past has become a bondage. Silkworm mouth it? As they grew up, and then use the little mouth to eat mulberry leaves,