She laughed with pure joy.

她由衷地笑起来。

《牛津词典》

Writing this post for example... it's pure joy.

就拿写本篇文章来说，它就是单纯的享受。

youdao

Most pregnant women's emotions will swing from really awful to pure joy.

许多怀孕女性会从古怪的情绪转变为纯粹的欢乐。

youdao

The military aspect of the show has been steadily growing, and this year is expected to make up about In sharp contrast to the military aspects of the show, some exhibitors appeared to revel in the pure joy of flight.

VOA: standard.2009.11.15

For the first time in a long time, the family laughed out of pure joy.

CNN: Youssif and family arrive in U.S.: 'Am I in heaven?'

"It was pure joy and the complete opposite of what I had just finished, " Ms. Reuben said.

WSJ: Re-Admission Policy | Cultural Conversation with Gloria Reuben | By Joanne Kaufman

It may start as a chore but it will quickly become pure joy.

FORBES: A Leadership Lesson from Meister Eckhart