这种方法是我大儿子读三年级学习几何的时候，我在无意中发现的，也许对你会很有启发。

I stumbled upon this approach when my oldest son was taking Geometry in third grade, and it's perhaps my best advice.

youdao

这种方法是我大儿子读三年级学习几何的时候，我在无意中发现的，也许对你会很有启发。

I stumbled upon this approach when my oldest son was taking Geometry in third grade, and it's perhaps my best advice.

youdao