Congratulations的缩写是GRATZ。意思是:”恭喜，祝贺“。
Congratulations, you have a healthy baby boy
恭喜，你生了个健康的男孩。
The club also offers its congratulations to D. Brown on his appointment as president.
俱乐部也对D.布朗被任命为主席表示祝贺。
Congratulations on your interesting article
祝贺你写出这么有意思的文章。