英语词汇“block signal”是什么意思，“block signal”的读音、用法及例句翻译-烛光网

词汇	block signal
释义	block signaln.（名词） A fixed signal at the entrance to a railroad block, indicating whether or not trains may enter.火车行止信号：火车站入口处，指示火车是否可以进站的固定信号
随便看	percents per centum percept perceptible perception perceptions perceptive percepts perceptual perch perch perchance perched percher Percheron Percherons perchers perches perching perchlorate perchlorethylene perchloric acid perchloride perchloroethylene perciatelli

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