The dive beneath an underwater tunnel is one part of it.

下方的水下隧道也是过山车轨道的一部分。

The fault line is very close to where the underwater tunnels will be.

断层线离将建成的水下隧道非常近。

An underwater tunnel! he exclaimed. A connection between two seas! Who ever heard of such malarkey!

一条海底地道！一条两海之间的通路！谁曾听说过呢？

It must have been a faulty maneuver because this underwater tunnel was obstructed by such blocks and didn't make for easy navigating.

这可能是由于一时驾驶不准，因为这条海底地道受冰群的堵塞，并不容易航行。

There is also a 6.7-kilometre underwater tunnel in the middle of the bridge. This is to allow ships to sail through the Delta.

桥中间还有一个6.7千米长的水下隧道。有了隧道船只才能通过三角洲。

According to TEPCO, the radioactive wastewater has been diluted as planned before being discharged via an underwater tunnel one km from the plant.

据东京电力公司称，放射性废水已按计划稀释，然后通过距离核电站一公里的水下隧道排放。