principle of continuity of electric current

例句：

1. 1. The teacher explained the basicprinciples of physics to us.
   老师向我们解释了物理学的基本原理。
2. 2. Thecompany's policy isbased on the fundamental principle offairness.
   公司的政策基于公平这一基本原则。
3. 3. The scientist proposed a new principle forsolving this problem.
   科学家提出了一个新的原则来解决这个难题。