名词
中文翻译：前向信号灯同义词
同义词：
['forward signal light', 'forward indicator light']
例句：
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1. The traffic policeman was directing the cars to use the left turn signal before the intersection.
交通警察在交叉口之前指示车辆使用左转信号。
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2. The driver had to stop at the traffic light before proceeding through the intersection.
司机必须在通过交叉口之前停下来。
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3. The pedestrians were instructed to use the crosswalk before crossing the road.
行人被告知在使用过马路之前使用人行横道。