Walls make us build a second wall in our head, a mental wall.

墙壁让我们在头脑中建造第二堵墙，一堵心理墙。

There, she found more walls and winter vegetables and glass frames, but in the second wall there was another green door and it was not open.

在那里，她发现了更多的墙壁、冬菜和玻璃框，但在第二堵墙上，还有另一扇绿色的门，它没有开着。