His sincerity is undoubted.

　　他的誠意是無容置疑的。

　　I can say in all sincerity that I knew nothing of these plans.

　　我可以十分坦誠地說，這些計劃我一無所知。

　　His obvious sincerity inclined me to trust him.

　　他滿臉的真誠，讓我愿意相信他。

　　Please accept our sincere apologies.

　　請接受我們真誠的道歉。

　　Sincere performances and gritty Boston settings add to the film's realism.

　　真誠的表演和對波士頓這一背景城市的真實刻畫增添了電影的現實主義色彩。