| 单词 | pop-up | 
| 释义 | pop-up1 of 2noun   ˈpäp-ˌəp  1   : pop fly   2   : a component or device that pops up   3   : a pop-up book   4   : a pop-up window on a computer screen   pop-up2 of 2 adjective1   : of, relating to, or having a component or device that pops up  a pop-up book 2   : appearing suddenly: such as    a   computing   : appearing suddenly on a screen over another window or display  a pop-up window a pop-up ad  b   of a business   : set up quickly for short-term operation in a temporary location  pop-up stores/shops pop-up retail The front lawn of nearly every home becomes either a parking lot or a pop-up market, perfect for hungry, thirsty fans held captive by the … lines of traffic.  c   meteorology   : appearing or developing quickly in isolation rather than as part of a line or grouping of storms  By Thursday you should be able to go coast to coast and see only pop-up thunderstorms … Late summer is prime time for "pop-up" thunderstorms: storms born of hot, moist air that occur without regard to frontal activity or other large weather disturbances that are more easily understood.  | 
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