In this paper, the factors of affecting the rate of biodegradation of plastic materials were studied, and the conditions of enhancing the rate of biodegradation were discussed.

本文对影响塑料生物降解速度的因素进行了研究和讨论，探讨在进行塑料生物降解性试验时提高降解速度、缩短试验时间的可能性。

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For an ideal cells scaffold, it has to possess certain biodegradation rate, good cells affinity, three dimension of multi- porous structure, as well as included controllable released growth factor.

理想的细胞支架应具有一定的生物降解速度、良好的细胞亲和性、呈特定的三维多孔结构，且含有可控制释放的生长因子。

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The biodegradation rate was greatly influenced by the sediment content and the initial concentration of petroleum contaminants, and such effect was different from one degradation stage to another.

水体中泥沙的含量和石油类污染物的初始浓度均显著影响石油类污染物的生物降解速率，且在不同时段的影响不一；

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