非法指令位, 非法指令字符的英文

• unallowable instruction digit

• 非法:    illegal; unlawful; illicit
• 指令:    instruct; order; direct inst ...
• 位:    place; location
• 字符:    character
• 非法指令:    disable instruction; illegal i truction; illegal instruction; instruction, illegal; unallowable instruction