n.一岁的动物；一岁马
The first defecation we saw was in a yearling, a little 50-footer. 我们第一次看到蓝鲸排便，是一头一岁左右，约15米长的小鲸干的。
When does a foal become a yearling? 雏马什么时候能变成一岁马啊？
