这孩子算术还没学会，更谈不上代数了。

The boy hasn't learnt arithmetic, not to mention algebra.

youdao

这孩子算术还没学会，更谈不上代数了。

The boy has not learnt arithmetic, not to mention algebra.

youdao

这孩子算术还没学会，更谈不上代数了。?。

The boy has not learnt mathematics, not to mention algebra.

youdao

This is a matter of simple algebra, of taking this and putting it here.

本质上讲,这是简单的代数运算,把这个式子代入上面的式子

耶鲁公开课 - 基础物理课程节选