adj.真誠的；誠摯的

How can I persuade you that I am sincere? 怎樣才能使你相信我是真心實意的呢?

I will oblige any sincere request. 我會答應任何誠意的請求。

I think he is sincere and quite without affectation. 我認為他為人誠摯，毫不做作。

Sincere congratulations on your son wedding please convey our best wish. 令郎喜結(jié)良緣謹此致以誠摯的祝賀并請轉(zhuǎn)達最美好的祝愿。

Please accept my sincere thanks and best wishes. 請接受我誠摯的感謝和最美好的祝愿。