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.

youdao

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.

youdao