Since the dawn of human ingenuity, people have devised ever more [color=red]cunning[/color] tools to cope with work that is dangerous, boring, burdensome, or just plain nasty.

• 自从人类开始发现自己的创造力以来，人们已设计出越来越聪明的工具来应付那些危险的、乏味的、繁重的、甚至仅仅是有点脏的工作。