Operational principle
[计] 工作原理, 操作原理
🧩 词语组成解析
🗣️ 情景例句
Tom's about to open the doors. Tom
准备要开门了。
He who has not tasted bitter knows not what sweet is.
不吃苦中苦，哪知甜中甜。
He usually takes a short walk in the evenings and is always home by seven o'clock.
傍晚常常出去溜达一会儿，并且总是在7点钟以前回来。