shelf margin system tract

例句：

1. 1. The shelf margin system is designed to prevent books from falling off the shelves.
   书架边缘系统旨在防止书籍从书架上掉落。
2. 2. The shelf margin system helps to maintain a clean and organized work environment.
   书架边缘系统有助于保持一个干净有序的工作环境。
3. 3. The shelf margin system was developed to improve storage efficiency and reduce clutter.
   书架边缘系统是为了提高存储效率和减少杂乱而开发的。