Run the following command to check if any IPSec tunnel is active.

运行以下命令检查是否激活了任何ipsec隧道。

youdao

If you do not find the tunnels between the machines you actually intend to have the tunnel, then run the following command to activate the tunnels.

如果在希望通过隧道连接的系统之间没有找到隧道，那么运行以下命令激活隧道。

youdao

The most difficult portion of the tunnel is the 57 km (35.4 mi) stretch that will run nearly 2, 000 feet (600 meters) under the Gotthard massif below the existing Gotthardbahn track.

隧道的最困难部分是57公里(35.4英里)的支线，它位于现在的Gotthardbahn轨道下方2000英尺(600米)以下的岩石中。

youdao

Senators commute thirty seconds between their offices and the chamber by electric subway cars that run along a tunnel under Constitution Avenue.

NEWYORKER: The Empty Chamber

Written evidence suggested the railway was operating by 1793 and Mr Griffin says they were able to prove the line must have run through the tunnel.

BBC: Derby

"I can't wait until my name gets called, when I get to run out of the tunnel and just be where I usually (am), " Revis said.

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