近年来常被应用于制备药物缓释剂的翻译：In recent years has often been applied to the preparation of drug controlled release preparation 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

In recent years, drug delivery agents are often used in preparation

In recent years has often been applied to the preparation of drug controlled release preparation

In recent years often is applied in the preparation medicine slow release medicinal preparation

In recent years were often used in preparing drug slow

In recent years has often been applied to the preparation of drug controlled release preparation