N-COUNT
防火墙(自动防止未经授权者通过网络侵入计算机的系统或程序)
A firewall is a computer system or program that automatically prevents an unauthorized person from gaining access to a computer when it is connected to a network such as the Internet.
例句
New technology should provide a secure firewall against hackers.
新技术应该能提供安全可靠的防火墙抵御黑客袭击。