学龄

例句：

1. 1. The child is in theschool-age range of 6 to12 years old.
   这个孩子处于6到12岁的学龄阶段。
2. 2.The teacher explained the concept of learning atthe appropriate age.
   老师解释了在适当年龄学习的概念。
3. 3. The children are in their earlyschool-age years, and they needextra care.
   孩子们正处于早期学龄阶段，需要额外的照顾。