It is important to identify the source of infection.

To prevent infection, don't forget to wash your hands.

I like writing letters on this beautiful letter paper.

The infectious capacity of this virus is very strong.

The number of people infected with the new coronavirus is rapidly increasing.

This sunshade is useful for blocking the strong sunlight.

I take a walk in the park every day.

I go to the gym three times a day.

It's wonderful to see the sun rise.

When the sun rises, a new day begins.