Dear Mr. Black,
亲爱的布莱克先生：

I'm happy to learn that you have got the opportunity to travel abroad and I'm writing to express my hearty congratulations to you.
很高兴得知你获得出国旅游的机会，特写信向你致以我最诚挚的祝贺。

As far as I know, traveling abroad has been one of your long-lasting dreams for many years. Finally, you win the chance by yourself through years of hard work and you absolutely deserve it. Congratulations on the
realization of your dream again!
据我所知，出国旅行一直是你多年来的梦想。你终于通过自己的数年的不懈努力赢得了这个机会，并且你完全应当获得这次机会。再次对你梦想成真表示祝贺！

Wishing you a fabulous journey abroad!
祝你拥有一个完美的旅行！

Sincerely yours,
Nicholas
尼可拉斯 谨上