The human immunodeficiency virus destroys the immune system, making the body unable to fight disease.

The human immunodeficiency virus destroys the immune system, causing the body to lose its ability to fight disease.

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 quoted the proverb 'Once a word leaves your mouth, you cannot chase it back even with the swiftest horse' to teach me to choose my words carefully.

He pointed to the location on the map with his index finger.

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

He said, 'Man shall not live by bread alone,' teaching me that spiritual satisfaction is also important.