For hundreds of years, dogs of all shapes and sizes -- labradors and terriers, chihuahuas and spaniels -- have held the position of man's best friend.
원문출처 : https://www.cnn.com/2020/10/30/world/dog-dna-intl-scli-gbr-scn/index.html
원문출처 : https://www.cnn.com/2020/10/30/world/dog-dna-intl-scli-gbr-scn/index.html