“一岁”的英语？

很多婴儿到一岁大时才开始长牙。Many infants do not cut their first tooth until they are a year old.她比我小一岁, 是属牛的.She is one year younger than I am; she was born in the year of the ox.我是库特,今年十一岁,我是个不可救药的人.I'm Kurt . I'm eleven ....