spread over spread out 区别

区别就是两者都是动词spread+介词短语但意思是不一样的，具体的不同如下

spread over中文意思是传遍，延续遍布于……，散布在

A thin-lipped smile spread over the captain's face.

spread out中文意思是展开铺开伸张

I traced the course of the river on the map spread out on my briefcase.