book of secondary entry

例句：

1. 1. This book of secondary entry provides a comprehensive overview of the subject matter.
   这本次要入口书提供了对该主题的全面概述。
2. 2. The book of secondary entry is essential for understanding the complexities of the topic.
   次要入口书对于理解该主题的复杂性至关重要。
3. 3. The book of secondary entry has been highly praised for its clarity and depth of analysis.
   次要入口书因其清晰和深入的分析而受到高度评价。