The circuit breaker tripped and the electricity stopped.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

Well then, I'm off.

The Bronze Age was an important period in human history.

He is a specialist in cardiology.

The doctor examined my heart using a stethoscope.

Moderate exercise and a balanced diet are important for maintaining the health of the respiratory system.

He attacked the enemy using a flamethrower.

This filter helps to improve the sound quality.