[英文翻译]只卖正版光盘是不现实/可能的。

It is impossible to sell only real discs.
只卖正版光盘是不可能的。

直译的
It's impossible to sell only genuine copies(CD/DVD) at present.

意译的

We have to face the reality that there is still a long way to achieve the goal of selling only genuine copies (CD/DVD).
我们必须面对的现实是：离只卖正版光盘的目标还很远。

Only selling real discs is impossible.