Researchers soon discovered that this disease,called canine parvovirus, was similar to the feline panleukopenia virus.

研究人员很快发现了被称为犬细小毒，类似于猫泛白细胞减少症毒的。

This heavily muscled reptile stalks about on four limbs,its fluid movements and feline grace belying its size.

只四足爬行的生物有着不符于其体型的迅敏行动和如猫般优雅。