puffin crossing
柯林斯词典
1. N a UK pedestrian road crossing with traffic lights signalling red to stop the traffic flow when pedestrians are seen on the crossing by infrared detectors. The green signal reappears when no pedestrians are seen on the crossing (英国的)智能人行横道; 当人行横道上的红外探测器检测到行人时，红灯亮起阻止车辆通过；未检测到行人时，绿灯会重新亮起
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