以下为句子列表：
英文: But exactly where hippos sit on the artiodactyl family tree has proved devilishly difficult to discern.
中文: 河马也属于偶蹄目，这点专家并无异议，但是牠们到底位在偶蹄动物演化树的哪个分支点上，一直都很难定论。
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英文: Protected Excavation Site of Pterodactyl Fossils<> On November 20,1989,Mt.Houmen in Aoli village was named as the Protected Excavation Site of the Linhai Pterodactyl Fossilsby the People`s Government of Zhejiang Province.It covers an area of 1000 square m
中文: 翼龙化石产地保护区<>一九八九年十一月二十日，浙江省人民政府公布岙里村后门山为“临海翼龙化石产地保护区”，保护区东西五十米，南北二十米。
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英文: New Pterodactyl oid Pterosaur from the Yixian Formation of Western Liaoning
中文: 辽西义县组发现一新的翼手龙类化石
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