研究人员使用的方法是将咖啡渣隔夜使其干燥，然后放入一些常见的化学溶剂中，例如正己烷、乙醚和二氯甲烷，来溶解咖啡渣中的油类成分。
The researchers start off by drying their coffee grounds overnight and then pour in some common chemical solvents, such as hexane, ether and dichloromethane, to dissolve the oils.
溶剂释放：溶剂在干燥过程中的蒸发。
Solvent release: solvent during drying process of evaporation.
确保玻璃板清洁干燥：用适当的溶剂清洗和清洁干净的棉纸或软布擦拭。
Ensure that the glass panel is clean and dry: wash with a suitable solvent and wipe dry with clean tissue or lint-free cloth.
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