Giving birth to a child is both painful and joyful.

生小孩是件既痛苦又令人高兴的事。

A wedding is a joyful celebration of love.

婚礼就是快乐的爱情庆典。

We're a very joyful people; we're very musical people and we love music.

我们是非常快乐的民族；我们能歌善舞，热爱音乐。