英语词汇“clear board”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	clear board
释义	clear board noun : a signal to an approaching railroad train that the block ahead is clear
随便看	place-money place-name placenta placenta placentae placental placental placental barrier placentalia placentalian placentalis placental sign placenta previa placentary placentate placentation placentiferous placentitis placentography placentoid placentoma placentome placer placer placer mining

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