英语词汇block signal怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	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	spermaceti spermacetis spermagonia spermagonium spermaries spermary spermat- spermatangia spermatangium spermatheca spermatia spermatia spermatic spermatic cord spermatic funiculus spermatics spermatid spermatids spermatium spermato- spermato- spermatocide spermatocides spermatocyte spermatocytes

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