principle of symmetrical conservation of molecular orbits

例句：

1. 1. The teacher explained the mathematical principle to us.
   老师向我们解释了数学原理。
2. 2. The company's policy is based on the principle of fairness.
   该公司的政策基于公平的原则。
3. 3. The new law takes into account the principle of equal opportunity.
   新法律考虑到了平等机会的原则。