另外，环蝶类的系统分类地位还有待于进一步研究。
As to the amathusiidae , its taxonomic level and phylogentic position need further more detailed studies .
环丁烷主要成蝶式构象存在，其中两翼间的二面角大约为20°。
Cyclobutane exists predominantly in a " butterfly " conformation , in which the dihedral angle between the two wings is about 20 ° .
环蝶