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

形态各异的不同种类蜉蝣稚虫生活在不同的小环境,表明种类演化和形态变化与环境有密切。

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.

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