null and void片語KK [nʌl ənd vɔɪd] /nʌl ənd vɔɪd/發音片語1無效、作廢、失效法律The court declared the contract null and void last week.法院上週宣告該合約無效。2不算數、形同無效引申Once he broke his promise, the whole arrangement became null and void.他一違背承諾,整個約定就不算數了。