Compliments are always best made behind closed doors
褒獎的話最好悄悄講

On praise, the experts have got it wrong: it should almost never be given in public. It is a dangerous, corrosive substance that has a powerful and positive effect on the person it is aimed at but is better administered behind closed doors, says Lucy Kellaway.
公開表揚某人是危險的。研究表明，當一個人被公開表揚時，受表揚的人和提出表揚的人都會立刻引來圍觀羣衆的嫉妒和憤恨。