The script USES df, extracts only the line you want with grep, and then USES awk to extract the fourth column of data, which is the amount of free space.

该脚本使用df仅提取了要进行grep的行，然后使用awk提取数据的第4列，该列是空闲空间的大小。

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The building is configured around a central core, providing large column free office space at all levels.

建筑围绕中心核心建造，在所有层有巨大的无柱空间。

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Internally the space is completely column free with all structure concealed within the external walls and glazed panoramic Windows.

内部空间是完全自由的，所有全景结构隐藏在外墙和玻璃窗口中。

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