Researchersareplacingroboticdogs（機器*）inthehomesoflonely...
問題詳情：Researchersareplacingroboticdogs（機器*）inthehomesoflonelyoldpeopletodeterminewhethertheycanimprovethequalityoflifeforhumans.AlanBeck,anexpertinhuman-animalrelationship,andNancyEdwards,aprofessor...