or so

副词 or so:

1. (of quantities) imprecise but fairly close to correct
   同义词：approximately, about, close to, just about, some, roughly, more or less, around

1. Grandad usually conks out (ie sleeps) for an hour or so after lunch.
   爷爷吃过午饭往往要睡一个小时左右。
2. The oil wells will all run dry in thirty years or so at the present rate of use.
   按现在的消耗速度，三十年左右现在的油井就会干涸。
3. The county town is a hundred li or so away from here.
   县城离这有百儿八十里。
4. There are 300 students or so in this middle school.
   这所中学大约有300个学生。