Thereisnosuchthingasafreelunch. 　　itmeans "nopain,nogain" 　　There'sno onebutlongs to succeed , but it's not easy to get success .anything 　　that promises quickreturns withoutmuch workis asure trap 　　. 　　2.Thereisnousecryingoverspilledmilk 　　Whatisdonecan'tbeundone. 　　3.Thinktwice,actwise. 　　thinktwicebeforeyoudo 　　（Secondthoughtsarebest.三思而后行） 　　4.Toomanycooksspoilthebroth. 　　Iftoomanypeopleareinvolvedinsth,itwillnotbedoneproperly. 　　或Iftoomanypeopletrytodosomething,thenthejobwillnotbedonewell. 　　5.Twowrongsdonotmakearight. 　　Youshouldnotdosomethingbadjustbecausesomeonedidthesametoyou.