The tachometer of my car has broken.

The United Kingdom of Great Britain and Northern Ireland is a country located in Europe.

The intermezzo in his piano concert was wonderful.

I work in the sales department.

His heart seems to have frozen.

She brought up her child alone.

The committee approved the new project.

He is researching on the pathogenesis and treatment of early-onset diabetes.

This area is rich in bedded cupriferous iron sulphide deposits.

Please teach me how to calculate the area of this circular sector.