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在日本,有的火车轨道下方安装有特殊的U型沟,以供乌龟安全地穿越铁轨。
因为之前不断发生乌龟在穿越铁轨时受伤,甚至卡在转辙机中阻碍到了交通,因此专为乌龟设计了这种U型沟槽通道,以此达到保障乌龟们的安全。


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