它同样计划构造一个无掺杂隧道的平面晶体管。
It, too, plans to build flat transistors with undoped channels.
江河的流动将会改变，海平面的上升将会增加机场、道路和隧道发生洪水的频率，它说。
River flows will change and rising sea levels will increase the frequency of airports, roads and tunnels flooding, it said.
独特之处： 坐落在787英尺的海平面下的青函隧道是世界上最深的隧道。
Why It's Unique: At 787 feet below sea level, theSeikan Tunnel is the deepest tunnel in the world.
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