Lower grades are seven or eight-year-old children, first entered primary school, almost nothing.

低年级都是七八岁的儿童，刚进小学，差不多什么都不会。

youdao

Lower grades are seven or eight-year-old children, first entered primary school, almost nothing.

低年级都是七八岁的儿童，刚进小学，差不多什么都不会。

youdao