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。
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.
油剂、润脂油、脂肪产品等油类沾染物应该用溶剂清洗或用工业用生物降解洗涤剂清洗，然后用水冲洗干净。
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.
目前的合成方法常用溶剂为异戊醇等，存在气味大，生物降解困难，环境污染较大；
The existing synthesis method generally uses isoamyl alcohol and the like as solvent, thus having the problems of strong smell, difficult biodegradation and higher environmental pollution.
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