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

popup中文意思是v.突然出现

Thesitesshieldthemselvesfromsearchengines,sotheydonotpopupinresponsetoonlinesearchesforthebrandstheyoffer.

popout中文意思是出；瞪出

EverysummerwhenItopupmyselectionofsummeroutfitsfromthedepartmentstores,myeyeswouldnearlypopoutofmyhead.