But viruses know their hosts well-they can break into cells undetected, switch off alarm systems, and undermine the cell's authority in deciding which genes get expressed.
但是，病毒知道他们的宿主- - -它们可以不被发现的侵入细胞，关掉警报系统，削弱细胞决定自身基因表达的权威。
Hackers who access the network will have the ability to turn off alarm systems and lights, leaving the home vulnerable to a break-in, or the theft could be more electronic.
黑客们会通过网络关掉你的自动警报系统或者照明系统，你的家就会很容易地被侵入，使电子盗窃也变得很容易。
Open the nearest fire alarm. If you are in the corridor, there is a fire alarm near the emergency exit, break the glass of the fire-alarm push the fire alarm button.
启动最近的火灾报警器——如果您在走廊里，在走廊的每一个紧急出口附近都设有报警器，敲碎报警器玻璃后按下火警报警按钮。
Open the nearest fire alarm. If you are in the corridor, there is a fire alarm near the emergency exit, break the glass of the fire-alarm push the fire alarm button.
启动最近的火灾报警器——如果您在走廊里，在走廊的每一个紧急出口附近都设有报警器，敲碎报警器玻璃后按下火警报警按钮。
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