spread out
1．extend伸展；铺开
The wood spread out in all directions．树林向四面八方延伸。
He spread out his arms and legs．他伸展开了四肢。
He spread out a map．他摊开了一幅地图。
2．disperse；scatter分散；散布
The men spread out over a wide area．人们分散在一块很宽阔的区域里。
The work has to be spread out over several weekends．这项工作不得不分散到几个周末去做。
3．develop发展
Our foreign trade is spreading out in all directions．我们的对外贸易正向各方面发展。
A scene of prosperity spreads out before us．一幅欣欣向荣的景象展现在我们面前。
spread over
1．cover；scatter over覆盖；散布于
The water spread over the floor．水溢到了地板上。
His interests now spread over several subjects．眼下他的兴趣遍及好几门学科。
2．（cause to）last for（a period of time）（使）持续（一段时间）
Their friendship spread over many years．他们的友谊持续了许多年。
The grammar lectures spread over into the next term语法课延续到下个学期。
You don't need to pay back the money you borrowed all at once；the repayment can be spread over a number of years．你借的钱不用一次全部还清，可以分几年偿还。