1. 歡樂   n.

The success of performance brought us a lot of joy.

表演成功給我們帶來很多歡樂。

2.樂事n.

On a hot day, swimming in the cool water is a joy.

大熱天在涼快的水中游泳是件樂事。

3.喜悅 n.

David, please remember that helping other people can be lots of joy.

大衛，請記住幫忙別人喜悅多。