无效❶annul; nullify; invalidate; override
❷null and void;invalid;of (or to)no avail
宣布法令～annul a decree/使否决～override a veto/宣布合同～annul a contract/合同～nullity of contract/要求判定婚姻～的诉讼nullity suit/使核武器～和过时render nuclear weapons impotent and obsolete/宣布条约～declare a treaty invalid (or null and void);invalidate(or nullify)a treaty/宣布选举～ nullify an election/医治～ fail to respond to medical treatment/～票invalid ballot/～指控invalid charge/～合同invalid contract/～审判mistrial |