Young children are beginning their formal education sometimes as early as four years old.

幼儿有时早在四岁时就开始接受正规教育。

《牛津词典》

I am twelve years old and have had over four hundred children.

我十二岁了，有超过四百个孩子。

youdao

I am twelve years old and have had over four hundred children.

我十二岁了，有超过四百个孩子。

youdao