他走了几步，然后向上爬到上一层的通道，然后不断向上直到看到屋顶的入口。

He walks a few steps, and then pushes his way up to the catwalk above him. He keeps climbing until he sees the roof access.

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设置脚手架，以提供通往屋顶的安全通道。

Set up scaffolding to provide safe access to roofs.

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在内部，两个黑框形式的盒子构成了服务台和公共事业设备，通道的中间有一棵树通过屋顶上的缺口向上生长。

Inside, two black boxes form the information desk counter and utilities, while a tree in the middle of the walkway grows up through a gap in the roof.

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