- The environment consists of the sum total of conditions which are concerned in the execution of the activity characteristic of a living being.
- We report two infants with proven peumococcal meningitis associated with anemia, thrombocytopenia, renal failure, and T-antigen activation characteristic of neuraminidase activity.
- The office has been humming with activity.
- The threat of war has depressed business activity.
- There has been a lot of activity in the town today.