翼龙是中生代时期在空中翱翔的巨大爬行动物。

___Pterosaurs were giant reptiles that soared through the skies during the Mesozoic era.

翼龙是会飞的爬行动物，与恐龙生活在同一时期但有别于恐龙。

___Pterosaurs were flying reptiles that lived alongside but were different from dinosaurs.