pop up和pop out用法

区别就是两者都是动词pop +介词短语，但意思是不一样的，具体的不同如下

pop up中文意思是v. 突然出现

The sites shield themselves from search engines, so they do not pop up in response to online searches for the brands they offer.

pop out中文意思是出；瞪出

Every summer when I top up my selection of summer outfits from the department stores, my eyes would nearly pop out of my head.