爱迪生所进行的电气化火车铁轨的实验导致了地下铁道的创建。
Edison's experiments with electrified train tracks led to the creation of subways.
在这个桥上行走非常危险，下面是电气化铁路，而且桥距地面有6米多高，还要小心桥上的火车。
Very dangerous to walk in the bridge, the following is electrified railway and Bridges from the ground 6 meters tall, and train to be careful on the bridge.
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