Umformer
变换器, 变流机, 直流变压器
🗣️ 情景例句
She takes her exams next week, so she's burning the midnight oil.
她下周要考试，所以在开夜车。
In every beginning think of the end.
思前顾后。
I don't doubt that he will help me.
我不怀疑他会援助我。