不现实的

It is impracticable for some parents to exact obedience of their children.

有些父母强令其子女服从是不现实。

I must point that it’s unpractical without any mistakes.

我必须指出不犯错误是不现实。

It is unrealistic to hope that all one's desires can be fulfilled.

希望自己所有欲望都得到满足是不现实。

It is unrealistic to presuppose a sophisticated knowledge of harmony and counterpoint in a beginning music student.

要求人具有和声和对位法方面知识是不现实。

Obviously this method has every limited application in most instances, because of the impossibility or impracticability of segregating specific items as coming from separate purchases.

由于要辨认存货不同购买来源具体批次是不现实，很明显别计价法使用有很大局限性。