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- They are building a submarine cable tunnel. 他们正在建设一条海底电缆隧道。
- They are digging through the hill to make a tunnel. 他们正在凿山建一条隧道。
- The kid dug a tunnel in the sand. 小孩在沙堆里挖了一个地道。
- helium tunnel 氦风洞
- The two lanes merge going into the tunnel. 两条车道会合后引入隧道。
- The truck cleared the tunnel safely. 卡车安全地通过了隧道。
- He has to stoop to get through the tunnel. 他得弯下腰走过地道。
- The roar of the train reverberated in the tunnel. 火车的轰隆声在隧道里回荡。
- Helium and neon are inert gases. 氦和氖为惰性气体。
- The prisoner escaped by digging an underground tunnel. 囚犯挖了一条地道逃跑了。
- The roof of the tunnel caved in (on the workmen). 隧道顶坍塌(压住工人).
- The antimatter equivalent of helium. 反氦与氦等价的反物质
- Helium was discovered on the sun. 氦是在太阳上发现的。
- The roof of the tunnel was supported by wooden props. 坑道顶用木柱支撑。
- Most big balloons are now filled with helium. 现在许多大气球中充的是氦气。
- A fountain of helium spurt out of the tube. 有一股氦的喷泉从小管中喷出。
- A tunnel dug to intercept and destroy an enemy's mine. 对抗地道截断或破坏敌人坑道而挖的地道
- Helium is a gas used in balloons. 氦是一种用于气球的气体。
- Suddenly the train roared into a tunnel and everything was black. 突然火车轰隆隆地驶入一个隧道，四周的一切都漆黑一团。
- The tunnel contract to a narrow passageway as you go deep. 再往里走，坑道缩小成了一条窄窄的通道。
