那些曾于其他地方成功运用的方法在孩子们的脑海中闪现出来：比如采用交通工具静音设备、架设天桥、穿上荧光外套及采取限速措施等。

The children come up with ideas that have been used successfully in other places: traffic calming devices, overpasses, fluorescent jackets and speed limits.

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即使有今天的无线电设备，信息传播也需要好几分钟，有时候甚至好几个小时，因为无线电和光波都是以每秒186,000英里的有限速度传播。

Even with today's radio equipment, the messages will take minutes-sometimes hours-on their journey, because radio and light waves travel at the same limited speed of 186, 000 miles a second.

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本文介绍了一种新研发设计的多功能电梯限速器自动检测设备。

This paper has introduced a new multi-function testing equipment development of speed governor of elevator.

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