It's not a question of some abstract concept of justice.

这不是一个有关正义的某一抽象概念的问题。

Time is an abstract concept.

时间是一个抽象的概念。

This is an abstract concept.

这是个抽象的概念。

Resistance is not some abstract concept.

耐药性不是某种抽象概念。

I can not understand the so abstract concept.

我无法理解如此抽象的观念。