pop down的用法和樣例：
例句
- Pop down to the shops and get a bottle of milk.
快到下面的商店里去拿瓶牛奶來(lái)。 - If you like, I'll pop down to the station and find out.
如果你要的話(huà)，我就跑到車(chē)站去查一查。 - If air is needed, the oxygen mask in the plane will pop down by itself.
如果空氣缺乏，飛機內的氧氣面罩會(huì )自動(dòng)放下。 - Pop down when you get time. It's always nice to see you.
有時(shí)間就來(lái)，看見(jiàn)你總那么高興。
