"Too young to attend school" 是表示年龄太小不能上学的常用说法。
来源：这是一个相对容易理解的说法，通常用来表示某人因为年龄太小而不能上学。
英文例句：
He is too young to attend school, he will have to wait another year.
She is not old enough to attend school, she still needs to wait a few more months.
中文翻译：
他太小了，不能上学，还需要再等一年。
她年龄太小，不能上学，还需要再等几个月。