Quadrapole
四极子
🗣️ 情景例句
Thank you for a most enjoyable evening.
谢谢你举办这样一个极其快乐的晚会。
How long will you be away?
你将离开多久？
He waited until someone new joined the company and then began to steal.
他等待有人刚加入公司后才开始偷窃。