The noun or adjective 'pop-up' refers to something that appears suddenly, or a type of batted ball in baseball.
名词或形容词 'pop-up' 指的是弹出式装置，或（棒球中的）内野飞球。
| 单词 | pop-up |
|---|---|
| 音标 | [ˈpɔpˌʌp] [ˈpɑpˌʌp] |
| 释义 | n.["弹出式","[棒]内野飞球","自动起跳式装置"] adj.["弹起的","有自动起跳装置的"] |
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