any of various hoofed mammals of the order Artiodactyla,which includes cattle,deer,camels,hippopotamuses,sheep,and goats,that have an even number of toes,usually two or sometimes four,on each foot

• 任一种偶蹄目有蹄的哺乳动物，包括牛，鹿，骆驼，河马，绵羊和山羊，这些动物有偶数脚趾，通常每只脚有两个或有时四个