sincerely

1. ADV If you say or feel something sincerely, you really mean or feel it, and are not pretending. 誠懇地; 真誠地

"Congratulations," he said sincerely. “祝賀，”他真誠地說道。

...sincerely held religious beliefs. …虔誠遵奉的宗教信仰。

2. CONVENTION People write "Sincerely yours" or "Sincerely" before their signature at the end of a formal letter when they have addressed it to someone by name. People sometimes write "Yours sincerely" instead. 謹上

Sincerely yours, Robbie Weinz. 羅比·溫玆謹上。