null and void片语KK [nʌl ənd vɔɪd] /nʌl ənd vɔɪd/发音片语1无效、作废、失效法律The court declared the contract null and void last week.法院上周宣告该合约无效。2不算数、形同无效引申Once he broke his promise, the whole arrangement became null and void.他一违背承诺,整个约定就不算数了。用这个字练口说→