principle of operation的用法和樣例：
例句
- The two machines work on the same principle.
這兩部機器的工作原理是一樣的。 - I shall never understand the workings of an engine.
我永遠搞不懂發(fā)動(dòng)機的工作原理。 - The working principle of the meter is introduced, and measuring accuracy of the meter is analyzed.
介紹了簡(jiǎn)易測量?jì)x的結構及操作原理，并對測量精度進(jìn)行了分析。
