Back in 20th century, bored scholars had to make do with flicking rubber bands at their classmates, doodling in their textbooks or staring out of the window. Modern technology has revolutionised slacking. Most teenagers in the rich wold own smartphones. Many are allowed to bring them into classroom, where each provides a bottomless source of apps designed to be as compelling ----and distracting ----as possible.
在20世纪，感到无聊的同学只能用橡皮筋 弹同学，在课本上涂鸦，或者望着窗外发呆打发时间，而现在科技彻底改变"摸鱼"方式，在富裕国家，大多数青少年都有智能手机，许多学生还被允许把手机带进教室，而每一部手机都装在着无穷无尽，极具吸引力且令人分心的应用程序。
