tunnel

• If the tunnel draws its air directly from the atmosphere, entirely fresh air is used .
  如果风洞直接从大气中吸进空气，那么使用的是完全新鲜的空气。
• The rabbit-hole went straight on like a tunnel for some way, and then dipped suddenly down .
  兔子洞里有一段路象隧道一样，一直往前，随后忽然往下拐。
• If tunnel is built , it will connect britain to europe for the first time in history .
  如果隧道建成，它将有史以来第一次把不列颠和欧洲大陆连接起来。
• Safety is always the first consideration in tunnelling and speed of advance is the second .
  在掘进中，安全总是应该首先考虑的问题，掘进速度则放在第二位。
• If changes are made to the tunnel after it has been built, it may be necessary to make a fan revision .
  在风洞建成以后，如果要进行修改，那么风扇也可能要更新。
• The reflection on his face in the train window when they went through a tunnel was a little sinister .
  当他们穿过隧道时，车窗上反映出他的面部，有点儿凶神恶煞的样子。
• Some tunnels provide canvas sandbags for supporting the model when it is resting on the floor or a table .
  有些风洞备有帆布沙袋，当模型放在地板上或桌子上时用作支持物。
• This immense chasm has been formed by an underground stream which has tunneled a course through a flaw in the rocks .
  这个巨大的陷穴是由一条地下小河穿过岩石裂缝形成的。
• The difference in level between the road surface in the tunnel and that on the bridge can hardly be less than 10m .
  隧道内的路面和桥上的路面之间的高差几乎不可能小于10米。
• Quantum-mechanical tunneling across the very small gaps occurs during the initial stages of separation .
  最初分离阶段，电子借量子力学的隧道贯穿机理，通过微小的间隙而转移。