He is trying to understand the concept of Trinity in Christianity.

In Christianity, God is considered as the Trinity of the Father, the Son, and the Holy Spirit.

The Tokyo metropolitan region is the center of Japan's economy.

My mother prepares a traditional Japanese meal every day.

He feels it takes time to acquire new skills, but Rome wasn't built in a day.

We have our wedding on the twenty-first day of the month.

I am waiting for his response.

I replied to her letter immediately.

The captain ordered a big turn around.

He is from the Hui people, a minority ethnic group in China.