名词
中文翻译：Unknown
同义词：
['inverse speed', 'reverse direction', 'reverse movement']
例句：
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1. The car is going at a reverse speed of 50 km/h.
汽车以50公里每小时的反向速度行驶。
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2. The driver must slow down to avoid hitting the pedestrians on the road.
司机必须减速以避免在路上撞到行人。
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3. The train will reverse its direction and head back towards the station.
火车将改变方向，返回车站。