1. The evaluation is unfair.
    这种评估是不公平的.

2. The adolescent, with his passion for sincerity, always respects a parent who admits that he is wrong, or ignorant, or even that he has been unfair or unjust.
    青少年酷爱真诚，对于能够承认错误或无知、甚至承认自己做得不分平或不公正的父母，他们总是尊敬的，

3. How dare you say I´m unfair?
    你怎么敢说我不公平？

4. I think the assignment is unfair.
    我认为分配不公。