N-COUNT
防火墻(自動防止未經授權者通過網絡侵入計算機的系統或程序)
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.
新技術應該能提供安全可靠的防火墻抵御黑客襲擊。