Japan's exclusive economic zone plays a crucial role in the management and utilization of marine resources.

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

It's difficult to handle this machine.

He continued to explain earnestly.

He is feeling solitude.

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.

Please take this medicine one sho at a time.

He is our salvation.

This job is a little more difficult than I thought.