Operational principle
[计] 工作原理, 操作原理
🧩 词语组成解析
🗣️ 情景例句
In those days, when they made quilts.
那个时代 ，人们做被罩时，
We used to go to the movies about once a week.
我们过去常一个星期大约去看一次电影。
Last year we helped them with the orange-picking.We really enjoyed working on the farm.
去年我们帮他们搞苹果。我们实在太喜欢在农场干活了。