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It's a frustrating thing most of us have experienced. 大多数人都有过这种沮丧的经历。 A song gets stuck inside of your head, seemingly playing on a permanent loop. 你的脑海里总回荡着一首歌，这歌似乎还处于循环播放模式。 But what are the most difficult tunes to shift - and why do they get stuck in the first place? 不过你知道最洗脑的歌曲都有哪些吗？为什么一听见它们，你就无法忘怀？ Well, now you can find out - because researchers have developed a mathematical formula to explain the phenomena. 嗯，现在你能搞明白到底是怎么回事儿了——因为研究人员已列出了能解释该现象的数学公式。 The experts claim the formula sheds light on why some musical combinations are unforgettable - and in some cases, inescapable. 专家称该公式能阐明某些旋律令人难以忘记甚至挥之不去的原因。 These include Happy by Pharrell Williams , the Village People's YMCA and Queen's Bohemian Rhapsody and We are the Champions. 法瑞尔·威廉姆斯（Pharrell Williams）的《快乐》、乡下人（Village People）的《YMCA》、皇后乐队（Queen）的《波希米亚狂想曲》和《我们是冠军》都属于洗脑神曲。 According to the research by the University of St Andrews, the recipe for an earworm has five key components. | 
