in the world all over the world

in the world
在世界上
all over the world
遍及全世界

不同咯。

in the world（用于加强语气）
Everyone else is stressed but he doesn't seem to have a care in the world.别人都很紧张，但他好象一点也不在乎。
There's no need to rush-we've got all the time in the world.没有必要急急忙忙的---我们有的是时间。
What in the world are you doing?你到底在干什么

in the world
世界上, 究竟
all over the world
adv.全世界

in the world 在世界上,究竟 ,常用在句首

all over the world 全世界 ,用在句尾或句中

in the world 在世界上
all over the world 全世界

in the world常用在句首

all over the world用在句尾或句中