不亦乐乎 (bú yì lè hū): Isn't it joyful? / Isn't it delightful? — Meaning & Stroke Order

Seeing the students enthusiastically discussing academic issues, the teacher was overjoyed with delight.

In the intense debate competition, the debaters from both sides went back and forth, arguing with great fervor, didn't they?

The children are running around in the park with great joy.

He was not busy with trivial matters to the point of delight; instead, he focused on the core tasks.

The volunteers organized community activities, with everyone dividing the work and cooperating, busily and joyfully.

He is busy preparing for the party and enjoying it immensely.

Although the project was complex and time was tight, the team collaborated efficiently, and everyone was exhausted yet filled with a sense of accomplishment.