Communtator
[建] 换向器, 整流器, 整流子
🗣️ 情景例句
It's too soon to know for certain.
现在还太早， 不知道确切情况 。
Nothing to be got without pains but poverty.
只有贫困可以不劳而获得。
In his own lifetime Galileo was the centre of violent controversy;
伽利略在世时是激烈论战的中心。