Quadrapole
四极子
🗣️ 情景例句
Oh, really?
噢， 是吗？
It must be about three thirty.
现在想必是三点三十分左右。
One day, the man downstairs went to talk to the man. He went upstairs and knocked the door.
一天，楼下人去找楼上人谈谈。 他上楼敲门。