I was amazed at his imprudence.

他的鲁莽使我大为震惊。

I hinted at his imprudence.

我曾暗示他的不谨慎。

Oh. I am sorry for my imprudence. I apologize to no end.

喔，对不起，我对我的鲁莽感觉非常抱歉。

I hinted at his imprudence, his folly, but he did not take my hint.

我暗示他的轻率，他的愚蠢，但他没有觉察我的暗示。

Their saying ‘Imprudence is the second happiness’ can only be understood by them.

“轻率是第二幸福”只有俄罗斯人他们自己可以理解。