It features a built-in laser, strobe light, audible message, and electroluminescent lamp working together to lead building occupants towards emergency exits.

它的内置激光，频闪灯光，声响信息，和电致发光灯共同工作将建筑物居住者引向紧急出口。

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You can do this via SNMP commands or an audible bell (echo x), and then send an email message with the mail command.

可以使用SNMP命令或听得到的铃声(echo x)发出警报，然后用mail命令发送电子邮件。

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Their message can be read much more easily than if they uttered an audible sound ;

整个宇宙向人类所发出的无声信息比人类耳朵能听见的有声信息更容易读的懂；

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