有个老师做过一个试验:让两个学生把蝶蛹带回家,观察蝶蛹破茧化蝶的过程。一天,两天,三天……在稚嫩的蝴蝶努力破茧的时候,两个学生都急得满头是汗。其中一个不忍看着幼蝶受苦,就用针把茧扎破了。在他的欢呼声中,这只蝴蝶很快就出来了,身体胖胖的,翅膀也很大,很惹人喜爱。第二 A teacher had a test: let two students bring the chrysalis back home, observe chrysalis broken cocoon butterfly process. One day, two days, three days ...... In the tender butterfly efforts to break the cocoon, both students are anxious sweating. One of them could not bear to look at the young butterfly suffered, punctured the cocoon with a needle. In his cheers, the butterfly came out very quickly, with a thick body and big wings, very lovable. second