a. full of or producing joy
a. 欢喜的, 高兴的, 令人高兴的
1. The children were joyful when they saw the balloons.
孩子们看到气球时非常快乐。
2. She has a joyful smile that brightens the room.
她有一个快乐的微笑，照亮了整个房间。
3. We had a joyful celebration for her birthday.
我们为她的生日举办了一个快乐的庆祝活动。