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.

I have started learning Traditional Chinese.

I am learning Simplified Chinese.

Zoonosis is a disease that spreads from animals to humans, or vice versa.

In order to solve problems, it is important to listen to the opinions of many people, as the saying goes, 'two heads are better than one'.

Ogura Hyakunin Isshu is one of the classical literatures of Japan.

He said, 'If you want to shoot a man, first shoot his horse,' and began to solve the smaller problems first.

He said, 'It's difficult to make a life,' explaining the phrase 'When a man steps over the threshold, he has seven enemies.'