英语语法分析

They are mainly distributed in the palaearctic, nearctic, oriental, ethiopian region.

他们主要分布在古北区、东洋区、新北区和非洲区。

Up to the present 239 species of the genus have been known from the world. they are mainly distributed in the palaearctic, nearctic, oriental, ethiopian region.

迄今为止，该属全世界共记载239种，为世界性分布，但主要分布于古北区、东洋区、新北区和非洲区。