This indicates that there is a close relationship between species divergence,nymphal morphology derivation and microhabitat.

形态各异的不同类蜉蝣稚虫生活在不同的小环境,表明类演化和形态化与环境有密切关系。

Spenser's continuation and divergence from the Arthurian romance tradition are discussed in order to clarify the dialectical equiponderant relationship between romance and allegory of the poem.

主要讨论的对象为史氏的诗与传统亚瑟王传奇结构之间的关连，目的在说明史氏诗中传奇与寓言的均势辩证关系。