随着黑客的出现，从防病毒程序到防火墙的层层安全措施被添加进来，试图阻止他们。
As hackers turned up, layers of security, from antivirus programs to firewalls, were added to try to keep them at bay.
你这两个文件感染了病毒，你得用防病毒程序清除。
These two documents have been inflected with the virus, you have to clean them with anti-virus program.
反病毒程序是有必要用的但是仍不能够经常的阻止渗透。
Anti-virus programs are necessary but don’t always guard against intrusions.
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