ovisac

例句：

1. 1.The ovisac is a small, leather-bound book that contains information about the history of the United States.
   这个小册子是一本皮革装订的书，里面包含了美国历史的信息。
2. 2.The ovisac was used to store and transport documents during the colonial era.
   在殖民时期，这个小册子被用来存储和运输文件。
3. 3.The ovisac was passed down from generation to generation as a means of preserving knowledge and traditions.
   这个小册子一代代传下来，作为保存知识和传统的一种方式。