Quadrapole
四极子
🗣️ 情景例句
It's nothing.
这没什么。
Where did you go yesterday?
你昨天去了哪里？
Such creatures have rarely been seen alive by man as they live at a depth of six hundred feet.
人们很少能看到活着的这类动物，因为它们生活在600英尺深的水下。