The Session Facade pattern can be used with both known and unknown actors.
会话虚包模式可用于已知的和未知的参与者。
We recommend that customers exercise extreme caution when they accept file transfers from both known and unknown sources.
我们建议客户在接受文件传输时要“极端小心”，不论该文件来自认识的人或者不认识的人。
Immediately after the quick, nearly effortless installation, Virtual Sandbox goes to work protecting your computer from future threats, both known and unknown.
后立即快速，几乎毫不费力的安装，虚拟沙盒去工作保护您的计算机免受未来的威胁，包括已知和未知的。
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