sincerity

I don’t doubt her sincerity, but I think she’s got her facts wrong.

我不怀疑她的诚意，但我认为她没弄清楚事实。

May I say in all sincerity that we could not have achieved this much without your help and support.

请允许我真心诚意地说: 没有你们的帮助和支持，我们就不可能取得这样的成绩。