or so通常放在句末，而about放在句首，这两个词均可来表示“大约”，例句：This piece of equipment weighs about (around)10 tons.This piece of equipment weighs 10 tons or so.
or so的相关例句
You can back up another two feet or so.
你可以再退两英尺左右。
We are expecting thirty or so people to come.
我们预计要来三十人左右。
It'll cost € 100 or so.
这大约要花100欧元。
George is going to help me, or so he says.
乔治会帮我——他是这么说的。
She never saw him again ─ or so the story goes.
从此她再没有见过他——或者据说如此。
about的相关例句
Did you see her piece about the Internet in the paper today?
你看了今天报纸上她写的关于互联网的文章没有？
He hopes to write a book about his experiences one day.
他希望有一天写一部关于自己经历的书。
It's about this high.
大约有这么高。
He doesn't like to talk about his private life.
他不愿谈及他的私生活。
There was much discussion about the reasons for the failure.
就失败的原因进行了大量的讨论。