大约，左右：用于表示一个数字、数量等不是精确的。
(of quantities) imprecise but fairly close to correct
同义词： approximately / about / close to / just about / some / roughly / more or less / around
... next to nothing几乎没有 or so大约,差不多 a far cry from同...有很大的差异,大相径庭 ...
... or conj.或者；否则，要不然 or so大约，左右 orange n.橙子，桔子；桔汁 ...
... at heart 心坎里,实质上 or so 大概,左右 at large 大多数,未被捕捉滴 ...
... open up 打开，开发，展现，开始，揭露 or so 大约，差不多 out of 来自，出自，从……当中，越出……范围外，失去，由于，缺乏 ...
We stayed for an hour or so.
我们待了一个小时左右。
I would put her age at about 50 or so.
我估计她的年纪大约是五十岁左右。
You can back up another two feet or so.
你可以再退两英尺左右。
They mourned greatly that one so young and fair, or so old and respected, should have died this way.
VOA : special.2009.04.18
That's very nice. So basically, you get a lot of benefit supposedly from this 7-Up soda from the 1920's or so.
这非常好，因此基本上，在二十世纪二十年代,喝到这样的七喜恐怕对你大有好处。
化学原理课程节选 : 麻省理工公开课
and then, from there, well yeah, have another round or so, and then yeah, you get an internship for the summer.
然后经过一或更多轮的赛选，你就可以找到暑期实习了。
SpeakingMax英语口语达人 : 实习生到正式员工
A century or so later, a greenhorn was a soldier who had not yet had any experience in battle.
VOA : special.2010.05.23
In the last generation or so, different groups have encouraged public schools to celebrate diversity and cultural differences.
VOA : special.2009.12.24
But the 570, 000 or so immigrants from Portugal, white and Roman Catholic, are fully assimilated.
However, it is a technology that bears watching over the next year or so.
There is also the prospect of a mild form of stagflation building, or so some economists say.