He is an expert in musicology.

He is an expert in orthoepy, teaching pronunciation.

This room is covered with soundproofing material, so the sound doesn't leak outside.

He honked the car horn to get my attention.

I am planning to go to school tomorrow.

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.