英语语法分析

In vitro release study showed that polyanhydride erosion is the mechanism of drug controlled release.

体外释放研究表明，聚酸酐的溶蚀是控释的机理。

The properties of important tissue engineering materials when planted into the body, such as polyhydroxyalkylester, polyanhydride, polyamide, were reviewed in detail.

采用系统分析、建立数学模型等方法探讨了骨组织工程材料快速成形的材料体系、实现原理、成形机理等。