木质素是第二天然聚合物，木质素的降解是碳素循环中的关键一步。
Lignin is the second natural polymer. The biodegradation of lignin is the key step of carbon recycling.
非病毒基因载体主要有脂质体、人工合成聚合物载体、天然聚合物载体、局部基因释放载体等。
Nonviral gene carriers include liposomes, synthetic polymeric vectors, natural polymeric vectors, local gene delivery vectors and so on.
再生纤维是用天然聚合物为原料、经化学方法制成的、与原聚合物在化学组成上基本相同的化学纤维。
Regenerated fiber is made of natural polymers through chemical methods, it has same chemical composition with original polymer.
在过去十年中，相当大的努力，试图开发支架组织工程，利用生物降解和生物相容性合成或天然聚合物。
Over the past decade, considerable efforts have attempted to develop scaffolds for tissue engineering, using biodegradable and biocompatible synthetic or natural polymers.
以合成聚合物或化学改性天然聚合物为基本成分的油漆及清漆（包括瓷漆及大漆），分散于或溶于水介质的。
Paints and varnishes (including enamels and lacquers)based on synthetic polymers or chemically modified natural polymers, dispersed or dissolved in an aqueous medium.
以合成聚合物或化学改性天然聚合物为基本成分的油漆及清漆（包括瓷漆及大漆），分散于或溶于水介质的。
Paints and varnishes (including enamels and lacquers)based on synthetic polymers or chemically modified natural polymers, dispersed or dissolved in an aqueous medium.
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