Gay

例句：

1. 1.She was very happy to see her old friends again.
   她很高兴能见到她的老朋友。
2. 2.He felt cheerful after a good meal.
   吃了一顿好饭后，他感到很高兴。
3. 3.Joyful moments are what make life worth living.
   快乐的时刻是让生活变得有意义的原因。