先来个小插曲。最近有个美国背包客在社交媒体上发帖：“刚到加尔各答，第一印象不是美食也不是人文，而是街头巷尾的垃圾堆。”评论区里印度网友直接自黑：“欢迎来到‘垃圾的王国’，这才是本地特色！”但与此同时，另一位新加坡网友在访问清洁城市苏拉特时，晒出了干净 ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...