youngest

例句：

1. 1. The youngest child in the family is my sister.
   家里最小的孩子是我的妹妹。
2. 2.She was the youngest in her class.
   她是班上年龄最小的学生。
3. 3. The youngest of the siblings always gets picked first.
   这个兄弟姐妹中最年幼的总是被选中。