Lab analysis revealed the miniscule bits to be carbon-based blobs of soil material—like decayed bits of plants and soil-dwellers.

而实验分析表明这些微粒原本是以碳为基础的土壤物质，比如在腐烂的植物和其他土壤寄居物中就能发现。

Instead of attempting to measure the moon's atmosphere in a direct way, investigators looked to the old soil material.

研究人员没有试图以直接的方式测量月球的大气，而是研究了古老的土壤物质。

The paper said micrometeorite impact and solar wind irradiation, the dominant space weathering processes, largely modified the composition and microtexture of soil materials on the moon.

微陨石撞击和太阳风照射是月球上主要的空间风化过程，在很大程度上改变了月球上土壤物质的组成和微结构。