Its tunnels were built using a method known as cut-and-cover, where rather than boring a tunnel through the ground, instead, a massive trench is dug, the railway built, and then the trench roofed over again.

地铁隧道是以明挖覆盖式工法兴建，不直接挖穿地面，而是挖掘坑道、兴建铁路轨道，再将地面回填。

They also used a technique called undermining, or digging tunnels under the walls then setting fires in them to cause the walls, which had timber frames, to collapse.

他们还使用了做挖坑道的技术，就是指在城墙下挖隧道并在其中放火，致木制结构的城墙倒塌。

They remain one of the most impressive feats of military engineering and helped the English to a seemingly impossible victory.

这些坑道至今仍是最象深刻的军事工程之，帮助英国拿下了这场看似不可能达成的胜利。

Take a tour through the great siege tunnels built during this time.

你可以参观当时建造的这座大围攻坑道。

" Funeral for Justice" . By Mdou MoctarThe outstanding rock guitarist of his generation plays a version of rock music that nods to his home in Niger. This record is more bellicose than his previous work, but no less thrilling for it.

《正义的葬礼》。 作者：莫杜·莫克塔尔 这位杰出的摇滚吉他手在其世代中演奏了向尼日尔家乡致敬的摇滚音乐版本。 这张唱片比他之前的作品更具战斗性， 但同样兴奋。 《在此坑道中》。 作者：杰西卡·普拉特。