the principle that if it is possible for something to go wrong , it will go wrong 墨菲法则（一种认为凡有可能出差错的事终将出差错的论断） The bus is always late but today when I was late it came on time - that's Murphy's law ! 那一路公共汽车总是晚点，可是今天我迟到了，它却准时来了——我想那一定是墨菲法则在起作用。 返回 Murphy's law