A rogue element is someone or something that behaves differently from others of its kind, often causing damage.
Computer systems throughout the country are being affected by a series of mysterious rogue programs, known as viruses.
全国的计算机系统正受到一系列被称做病毒的诡异程序的影响。
rogues
A rogue is a man who behaves in a dishonest or criminal way.
Mr Ward wasn't a rogue at all.
沃德先生根本不是个无赖。
If a man behaves in a way that you do not approve of but you still like him, you can refer to him as a rogue.
Falstaff, the lovable rogue.
福斯塔夫,这个可爱的捣蛋鬼。