sincerely
adv. 由衷地，真诚地
例句
"Congratulations," he said sincerely.
“祝贺，”他真诚地说道。
《柯林斯英汉双解大词典》
I sincerely believe that this is the right decision.
我由衷地认为这个决定是正确的。
《牛津词典》
I sincerely hope you will soon recover.
我诚恳地盼望你早日康复。
