He sacrificed his time for the team.

This silkworm produces beautiful silk.

Physical education is my favorite class.

Education is an important element in building the foundation of society.

The National Aeronautics and Space Administration announced a new space exploration plan.

I bought a drink from the vending machine.

She is working in nursing.

My daughter will start going to a new nursery school from next week.

His growth is very fast.

Please calculate the arithmetic mean of this dataset.