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将PEG通过与羟基酸共聚，赋予凝胶体系生物可降解性；
Through the copolymerization with hydroxy acid, PEG is endowed with gel system biodegradability;
youdao
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将PEG通过与羟基酸共聚，赋予凝胶体系生物可降解性；
Through the copolymerization with hydroxy acid, PEG is endowed with gel system biodegradability;
youdao