歌手：美国民歌
old macdonald had a farmyi-a-yi-a-oand on his farm he has a duckyi-a-yi-a-owith a quarkquark here and quarkquark therehere quark there quarkeverywhere quarkquarkold macdonald had a farmyi-a-yi-a-oand on his farm he has a dogyi-a-yi-a-owith a ruffruff hereand ruffruff therehere ruff the
