1. 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，

2. I have a query about his sincerity.
    我对他的诚意有怀疑。

3. I was moved by his sincerity.
    我被他的真诚感动了.