It is not advisable just to sit there brooding about the unpleasant bygones.

老是坐在那里闷闷不乐地想着过那些不愉快情并不好。

The room had the elegance of a bygone era.

这个房间有着旧时代优雅。

I’m willing to let bygones be bygones.

捐弃前嫌。

His talk was evocative of the bygone days.

他谈话令回忆起往昔时日。

Let bygones be bygones and let's forget about our disputes and be friends again.

"过不必再提了,让们忘掉过争论,和好如初吧。"

This is a ridiculous situation, avoiding each other like this. Why can’t we let bygones be bygones?

们这样互相迴避未免太可笑了，为什么不能忘记以前不愉快呢？