开诚布公的英文：
[Literal Meaning]
open/sincere/announce/fair
to speak frankly and sincerely

[解释]
以真诚对待别人，没有私心。

[Explanation]
in an open and honest way of speaking

[例子]
我希望我们能够找个时间开诚布公地谈一谈。

[Example]
I hope we can find a time to talk frankly and sincerely.

[英文等价词]
to put all cards on the table

Frank and straightforward
开诚布公

I saw that I must speak bluntly and openly
我认为我必须开诚布公地讲了。

For them to front an evil with plain speech is to be guilty of effrontery.
对他们来说，与魔鬼开诚布公的讲话是一种厚颜无耻的罪过。

Few of our political leaders are willing to talk plainly and honestly about the emergency facing the country.
我们的政治领导人没有几个愿意开诚布公地谈论国家所面对的紧急情况。

On the first day he let me work as I wanted to, but on the second day he really laid the rules on the line
第一天，他让我干我想干的事，但到了第二天他就开诚布公地给我定了规矩。