He is always in the best of spirits, making those around him happy.

This problem requires the calculation of the tangent.

I am solving a problem to find the value of the tangent, which is one of the trigonometric functions.

At the school assembly, we all sang the national anthem in unison.

At the school assembly, we all sang the national anthem in unison.

This world is a part of the circle of life.

He won the primary award in the contest.

The legend of Kau has been handed down from ancient times.

I decided to keep a dog.

At the spring festival, flowers rained down from the cherry trees as if it was raining flowers.