rasy

In a sentence

• W parku widziałem psy różnych ras.

  In the park, I saw dogs of different breeds.

  In this sentence, 'ras' refers to breeds of animals, such as dogs.

• Ludzie wszystkich ras powinni być traktowani równo.

  People of all races should be treated equally.

  Here, 'ras' is used to denote human races or ethnic groups.

• Naukowcy badają rozwój ras w procesie ewolucji.

  Scientists study the development of races in the process of evolution.

  In this context, 'ras' depicts groups of organisms or species in evolutionary studies.