operating principles

• 工作原理

operating principles的用法和样例：

例句

1. This is the basic operating principle of many thermostats.
   这是许多恒温箱的基本工作原理。
2. The elements and working principles of electric fire monitor system were expounded.
   对电气火灾监控系统的组成及工作原理进行了阐述。