詞語：Palaearctic
Palaearctic的解釋
Palaearcticadj. 古北區的（包括歐洲、亞洲北部阿拉伯北部以及非洲的撒哈拉以北部分）
Palaearctic的意思
Palaearctic 古北極的;古北區;舊北區;古北界;Palaearctic province 舊北域;周北極區;Palaearctic Oystercatcher 蠣鸻;palaearctic region 舊北區;palaearctic fauna 古北動物相;
Palaearctic的參考例句
1.Avian funna are composed of 4
4. 8 % species of Palaearctic realm species, 40. 8% of Orienial realm species and 1
4. 4% of epidemic species. 對繁殖鳥類的區系分析表明：古北界種類占繁殖鳥總數的44。8%，東洋界種類占40。8%，廣佈種占14。4%，古北界種類稍佔優勢。
2.Conclusion: There is a rich diversity of black flies in Shanxi province and it is showed that there is a fauna character of palaearctic realm. 結論：山西省具有蚋類多樣性，反映了古北界的區系特徵。
3.Among breeding birds, the rate of the Palaearctic species and Oriental species is 1:
3. 87, which shows more characseristics of Oriental realm. 在繁殖鳥中古北界種類與東洋界種類之比為1：3。87，偏重於東洋界。