a process in which a number is approximated as the closest number that can be expressed using the number of bits or digits available 凑整(四舍五入)
noun [具体名词] 凑整；制圆；发圆唇音
He had sought work as a cowboy, rounding up cattle. 他曾经找过一份当牛仔的工作，负责看牛不让其失散。
verb [vt. 及物动词] 绕行；使变圆；凑整（round 的现在分词）
They're going house to house, rounding up the residents. 他们正挨家挨户将居民集中到一起。
