Communtator compound
[建] 用于换向器或整流器的润滑剂
🧩 词语组成解析
[建] 换向器, 整流器, 整流子
🗣️ 情景例句
Ms Lin worked hard all year.
林小姐一年到头辛勤工作。
I think dimes and quarters will do.
我看1角和2角5分的硬币就可以了。
Before? After? said the doctor.
“饭前？饭后？”医生说。