Today is a red-letter day.

对于他们来说，今天是个好日子。

Well it will be a red letter day.

嗯这将是一个红色的日子。

Today is a red letter day for us.

今天对我们来说是个值得庆祝的喜庆日子。

October1 is a red-letter day for all the Chinese people.

十月一日是全中国人民的一个大喜日子。

Daniel:This is a red-letter day for you. Congratulations!

丹尼尔：今天是你的大日子。祝贺你哦！

It was a red-letter day for Ann when her first book got published.

安的第一本书出版的日子对于她来说是个值得纪念的日子。

The day I graduated was a red-letter day for my mum, she still talks about it today!

对母亲而言，孩子的毕业日是个大日子。直至今日，她还会说起这件事！

This is a red-letter day for Susan, she made her first sale to a very important client.

今天是苏珊的大日子，她和一个重要客户做成了第一笔生意。

John got promoted and engaged to be married yesterday; it was truly a red-letter day for him.

约翰昨天订婚了，同时他又获升职；这对他可真是个值得纪念的日子。

It is to popularize firedamp pool actively, change bavin burning a red-letter day, protect silvan natural resources.

二是积极普及沼气池，改燃节柴，保护森林资源。