I specialize in training horses.

He trains his dog every day.

He is living in a frontier area.

The instructor taught us new techniques.

Due to the recession, many companies went bankrupt.

He fractured his thoracic vertebra.

When the strong shaking occurred, we immediately evacuated.

The vice-principal plays a crucial role in helping run the school.

He is suffering from pleurisy.

When fluid accumulates in the pleural cavity, it becomes difficult to breathe.