动物群...

Brackish waters generally support only a small range of faunas.咸水水域通常只能存活为数不多的几种动物。We shall appreciate this difficulty more clearly, by looking to certain existing faunas and floras.通过观察某些现存的动物群和植物群,我们就能更清楚地了解这种困难了.Most ...

faunas的音标：...