The client insisted on keeping the interior raw and austere, meaning no varnish or paint was applied to wooden walls, floors and ceilings.

客户坚持保持室内的原始材料和朴素感，也意味着木制墙面、地板和天花板不会使用油漆或涂料。

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The outer enclosure of the walls reuses wood from the barn, while the interior keeps the industrial wood finishing, applying only a clear varnish for ceilings and paint for vertical surfaces.

外部的墙面使用的是谷仓回收的木材，而内部则用工业加工过的木头装饰，油漆则主要是用于天花板和垂直的墙面。

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Moreover iron, which gives the planet its characteristic hue, would naturally cling to the varnish, protecting interior organisms from the harmful effects of intense ultraviolet radiation from the sun.

CNN: Researcher: Mars rock varnish hints of life