1、27th是twenty-seventh，读作：英[ˈtwenti ˈsevnθ]美[ˈtwenti ˈsevnθ]

2、27th的意思是第二十七;

3、[例句]I went to join in the celebration dinner party for the twenty-seventh Teachers Day this evening.今天晚上，我去参加庆祝第二十七个教师节的晚宴了。