学习笔记：
★colt：小马
例句：This colt is only two months old这只小雄驹只有两个月大。
★lamb：羊羔
例句：The lamb had to be brought up by hand.这只小羊要用奶瓶喂养。
★puppy：小狗
例句：The puppy snapped the cookie out of the child's hand.小狗一口衔走了孩子手里的饼干。
★kitten：小猫
例句：She sorrowed over the lost kitten.她因丢失了小猫而懊丧不已。
★calf：小牛
例句：calf liver is frequently broiled, pan fried.小牛的肝通常用来烤、烙或炸。
