Preaccealerating electrode
[电] 前置加速电极
🧩 词语组成解析
🗣️ 情景例句
Being a mother is not easy,
当一个母亲真不容易，
Gentlemen! Can't you agree on anything?
先生们，可否赞成一项？
I'm sorry, I don't know. You'd better ask that policeman.
对不起，我不知道。你最好问问那位警察。