He was the first to mount the breach in the city wall.

他首先登上城墙豁口。

The city wall is high and thick.

城高以厚。

But this is not a city wall.

这可不是什么城墙啊。

The first city wall is under our feet.

我们脚下的就是第一道城墙。

This city wall can resist enemy attack.

这座城墙可以抵抗敌人的进攻。