channel tunnel

例句：

1. 1. The channel tunnel connects the two countries.
   这条通道隧道连接了两国。
2. 2.The tunnel is so narrow that only one person can pass through at a time.
   这个隧道太窄了，只能一个人同时通过。
3. 3.The tunnel was built to help reduce traffic congestion in the city.
   这个隧道是为了帮助减少城市中的交通拥堵而建造的。