Since the dawn of human ingenuity, people have devised ever more cunning tools to cope with work that is dangerous, boring, burdensome, or just plain nasty

• 文章第一段第一句指出自人类获得创造力以来,人们便不断创造越来越灵巧的工具来对付危险、乏味、繁重甚至肮脏的工作