You can always tell sincereness from flattery.

你总能分辨出真诚和奉承。

Her sincereness in the apology was evident to everyone.

她在道歉中的真诚显而易见。

The sincereness in his voice convinced me to believe him.

他声音中的真诚让我相信了他。

The sincereness of his words touched everyone's heart.

他话语中的真诚打动了每个人的心。

Her sincereness made her a trusted friend among her peers.

她的真诚使她成为同龄人中值得信赖的朋友。

Believe that our sincereness ensures you to get better resplendence.

相信我们的挚诚一定会使我们共同走上新的辉煌!