I read the Letter to the Ephesians and gained a deep understanding of Christian teachings.

We are here to solve that problem.

I like memorizing the Hyakunin Isshu.

It's difficult to memorize the Hyakunin Isshu.

He is studying the history of African Americans.

They have a variety of opinions, making it difficult to agree.

He is recognized as the top person in that field.

Mou is a common surname in China.

It is important to learn about the prevention and treatment of the human immunodeficiency virus.

He is feeling solitude.