They went into action at a given signal.
的信号发出时，他们投入了战斗。
Then they gave each traffic signal a sensor that provides information about traffic at a given moment.
然后，他们给每个交通信号灯装上传感器，用以了解特定时段的路面信息。
This should give users a more accurate display of signal strength at any given time, the company said.
该公司表示，他们会让用户在任何时间得到更准确的信号强度显示。
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