underlying document

例句：

1. 1. The company's decision to invest in new technology was based on its underlying document.
   该公司决定投资新技术是基于其基础文件。
2. 2. The government's policy is heavily influenced by the underlying document of the constitution.
   政府的政策措施深受宪法基础文件的影响。
3. 3.The research team has developed a new algorithm that can analyze the underlying document of a complex system.
   研究小组开发了一种新的算法，可以分析复杂系统的底层文档。