principle of hypothetical compensation

例句：

1. 1. The teacher explainedthe basic principles of physics tothe students.
   老师向学生们解释了物理学的基本原理。
2. 2. The company's fundamental principle isto provide quality products at reasonable prices.
   公司的基本理念是提供质量上乘且价格合理的产品。
3. 3. The scientist discovered a fundamentalprinciple that explains why certain phenomena occur.
   科学家发现了一个基本原理，解释了某些现象发生的原因。