There was a loose paving slab at the top of a flight of steps.

爬楼梯爬到顶 踩到一块松动的砖。

I opened the gate, noting with relief that he had made a rudimentary path of paving slabs over to the railway carriage since I had last been there.

我打开大门，欣慰地注意到自从我上次到那里以来， 他已经用铺路板铺了一条通往火车车厢的基本道路。