可是那些在凹点的金线不太可能被带回地球，所以科学家还不能确定这在每个“夏天”都在凹点排成线而且发光的黄色灰尘的化学成分。
The 'gold' pits isn't likely to be ferried back to Earth, though - scientists remain unsure of the chemical composition of the yelllow, shimmering dust that lines the pit walls every 'summer'.
一项最新的研究发现，在人类的肌肤油脂中含有某些物质，它们是室内灰尘的重要组成成分。
Substances in human skin oil are significant components of indoor dust, a new study found.
奥术材料成分：一块天然磁石和一小撮灰尘。
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