分词翻译
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指令的英语翻译：
dictate; directive; injunction; instruction; mandate; statement
【计】 directive; I; instruction
【经】 command; injunction; instruction; precept
