principle of operation

• 工作原理

principle of operation的用法和样例：

例句

1. The two machines work on the same principle.
   这两部机器的工作原理是一样的。
2. I shall never understand the workings of an engine.
   我永远搞不懂发动机的工作原理。
3. The working principle of the meter is introduced, and measuring accuracy of the meter is analyzed.
   介绍了简易测量仪的结构及操作原理，并对测量精度进行了分析。