railroad tunnel

常见例句

• Close to the grottos, there is a cinema inside a deserted railway tunnel.
  洞穴的附近有一個廢棄的鉄路隧道，裡麪設有電影院。
• It is shown that an electrified railway tunnel is an effective channel for transmission of language and slow digital signals.
  研究表明，電氣化鉄路隧道是語音和低速數字信號傳輸的有傚信道。
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