我写完了一本小学四年级的练习册，我掌握了大部分的知识，像一些数学的术语。

I have finished a grade four math exercise book of primary school. I have possessed the most knowledge. Like some math terminology.

youdao

我写完了一本小学四年级的练习册，我掌握了大部分的知识，像一些数学的术语。

I have finished a grade four math exercise book of primary school. I have possessed the most knowledge. Like some math terminology.

youdao