宣布无效

【法】 defeasance; quash

宣布的英语翻译：

declare; announce; bill; blaze; herald; proclaim; set forth; set out
ventilate
【经】 publish

无效的英语翻译：

be of no effect; invalidity; impotence; inefficacy; nullification; nullity
【计】 IDL; ineffectiveness
【医】 inefficacy
【经】 inefficiency; null and void