非有机材料必须被删除，除非它们是由几个新的淀粉基生物降解聚合物，随着时间的推移。
Non-organic materials must be removed, unless they are made of several new starch-based polymers that biodegrade over time.
主要研究以淀粉为基材的降解材料的配方及其缓释性质。
The controlled-release character and formulation of degradable materials with starch used as the base material were studied.
淀粉材料由于成本低、易于得到、加工相对容易、可完全降解，因此前景比较广阔。
Due to its low cost, availing and producing easily, and complete degradation, starch material will be ap - plied in wide fields.
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