Martial tunnel

英 美
  • 坑道
  • martial adj.军事的;战争的;好战的
  • tunnel n.隧道;地道;洞穴v.挖地道;挖隧道
    1. They have had the tunnel shored up with concrete.
      他们已经叫人用水泥把坑道加固。
    2. The roof of the tunnel was supported by wooden props.
      坑道顶用木柱支撑。