The horny sheath covering the toes or lower part of the foot of a mammal of the orders Perissodactyla and Artiodactyla,such as a horse,an ox,or a deer.是什么意思_The horny sheath covering the toes or lower part of the foot of a mammal of the orders Perissodactyla and Artiodactyla,such as a horse,an ox,or a deer.在线翻译_英语_读音_用法_例句