fundamental interval

例句：

1. 1. The fundamental principle of this experiment is that the variables must be controlled.
   这个实验的基本原则是必须控制变量。
2. 2.Fundamental research in neuroscience has led to significant advancements in understanding brain function.
   神经科学的基础性研究已经导致了对大脑功能理解的重大进步。
3. 3.The company's fundamental values are integrity and customer satisfaction.
   公司的根本价值观是诚信和客户满意度。