To make their lens, the researchers took a biodegradable polymer called PLGA and dissolved it in an organic solvent, and then they added their drug.
研究者采用了一种叫PLGA的生物降解聚合物来制造镜片，首先将其溶解在有机溶剂里，然后加入药物。
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ECO2 created the first waterless recycling process, employing a corn-based, biodegradable liquid solvent that dissolves buildup and is then distilled so it can be reused.
Oils, greases, fats products and others oily contaminants shall be totally removed by means solvent cleaning or by means of an industrial biodegradable detergent, followed by water rinsing.