Mechanical efficiency
[机] 机械效率
🧩 词语组成解析
🗣️ 情景例句
Oh, Miss Li. This is Tom. I didn't recognize your voice.
噢，李小姐。我是汤姆。我没听出你的声音。
I shave, brush my teeth, and comb my hair.
我洗脸，刷牙，梳头。
There should always be exceptions to the rule.
凡事总有例外。