rare breed

noun
1
a variety of farm animal that only exists in small numbers, especially one that is traditionally farmed in a particular region
نژاد نادر, نژاد کمیاب, نژاد محلی نادر
2
a person or thing with characteristics that are unusual among people or things of their kind
گونه نادر, پدیده نایاب, گونه کمیاب, فرد استثنایی, چیز نادر, شخص منحصر به فرد, نمونه غیرمعمول, موجود متمایز
He's that rare breed of politician who has remained true to his ideals.