This constraint disqualifies the use of this analysis for polymorphic viruses.

由于有此约束，图中的分析不能用于多态病毒。

youdao

The advent of complex polymorphic viruses actually killed off some scanners that were unable to move to more advanced detection techniques.

复杂变形病毒的出现在使得许多杀软被病毒破坏的同时，并没有促成更先进的反病毒技术的产生。

youdao

This model can defend not only common viruses, but also variable viruses, polymorphic virus and unknown new viruses.

此模型不但可以防御常规病毒，而且可以防御变种病毒、多态病毒、以及未知新型病毒。

youdao

So-called polymorphic viruses employ encryption to scramble themselves.

ECONOMIST: Computer viruses

The Virus Bulletin tests try to catch out anti-virus software with a variety of malicious programs including bots and worms known to be spreading online, file infectors, polymorphic and macro viruses.

BBC: NEWS | Technology | Windows 'fails' active virus test

While Live OneCare did manage to spot 100% of the macro viruses it was tested against, it missed some wild viruses, polymorphic programs and file infectors.

BBC: NEWS | Technology | Windows 'fails' active virus test