Murphy's law
noun[U]
humorousuk/ˌmɜː.fiz ˈlɔː/us/ˌmɝː.fiz ˈlɑː/(UKoffensivealsoSod's law)theprinciplethat if it ispossiblefor something to gowrong, it will gowrong:
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）Thebusis always late but today when I was late it came ontime- that's Murphy'slaw!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。
Good luck and bad luck
- align
- bad/hard/tough luck!idiom
- be bad luck onsomeoneidiom
- be down onyourluckidiom
- be in/out of luckidiom
- blessing
- fortune smiles onsomeoneidiom
- get the short end of the stickidiom
- godsend
- grace
- hapless
- merciful
- mercifully
- mercy
- miracle
- misadventure
- shame
- streak
- with any luckidiom
- your luck's in!idiom