He has a pain in the knee.（英译中)

He has proved his courage in the battle.（英译中)

His left knee was hurt in a traffic accident.（英译中)

He knocked a big hole in the wall.（英译中)

He has been here in London for many years.（英译中)

He has a degree in world history.（英译中)

He has gained rich experience in these years.（英译中)