ramparts

A mole can undermine the strongest rampart.

鼠能毁坏最坚固的堡垒。

There is guard toing-and-froing along the rampart.

有个卫兵在沿着城堡来回走动。

It seems unnecessary to have watchmen like me on the Wall in the future when people along the Wall know better than to further vandalize the rampart.

不过，照现在的形势来，我觉得将来最好是不再需要设我这样的长城护员了，那就说明长城沿线的护长城的意识已经到了相当高的境界了，为破坏长城的现象再也没有了。