roughly, around都可表示在距离、时间、数量等方面“接近,大约”。
roughly
意为“粗略,大约”,经常用来代替approximately或about。该词常含有随便、草率的意味。
around
意为“大约”,有时用于非正式场合,可以代替about或approximately
Roughly speaking, I think we are heading for the depression.大体说来,我认为我们正走向萧条。
He went to bed around midnight.他大约半夜才去睡觉。