他们主要分布在古北区、东洋区、新北区和非洲区。
They are mainly distributed in the palaearctic, nearctic, oriental, ethiopian region.
中国球蚜科有6属20种，分布在黑龙江、云南、四川等地，主要是古北区成分。
Furthermore, Adelgidae species in China includes 20 known species in 6 genera and mainly on Palaearctic Regions.
结果在河北省发现齿股蝇属15种，古北区均有分布，其中5种仅在古北区有分布。
Results there are 15 species of genus hydrotaea in hebei province , which all destribute in palaearctic and 5 species only in palaearctic.
结论：河北省溜蝇属昆虫种数约占该科全国已知种数的52.78%，属于古北区系。
Conclusion: The species of genus Lispe in Hebei Province make up 52.78% of known Lispe in China and have a Palaearctic distribution.
其中古北界种连同古北界共同种占93.9%。表明山西省丽蝇科昆虫属于古北区系。
There are 93.9% of the total belonging to Palaearctic Region, which means, in Shanxi Province, most species have a Palaearctic distribution.
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。
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.
从油气系统角度分析了华北区古生界的石油地质条件。
The Palaeozoic petroleum geological condition of Huabei area had been analyzed in detail from the petroliferous system angle.
从油气系统角度分析了华北区古生界的石油地质条件。
The Palaeozoic petroleum geological condition of Huabei area had been analyzed in detail from the petroliferous system angle.
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