This chemical is harmful.

This chemical is harmful and has a negative impact on the environment.

Let's wash our hands well for sterilization.

Doctors need to sterilize their hands before surgery.

Please always sterilize this surgical instrument before use.

This instrument has already been sterilized.

There is a roofed bench in this park.

In this area, mauling by a bear occurs frequently.

I learned about bacterial culture in my microbiology class.

This box contains contraband.