真诚的用英语怎么说

真诚的用英语可以翻译成 sincere。来源：该词源于拉丁语的 sincerus，意思是“纯净的”、“无污染的”。例句：
I appreciate your sincere efforts to help me. (我感谢你真诚的帮助。)
She expressed her sincere apologies for the mistake. (她真诚地为错误道歉。)
He always greets me with a sincere smile. (他总是带着真诚的微笑向我问好。)