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"四舍六入五留双" 英语怎么讲

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"四舍六入五留双" 英语怎么讲
做文件翻译时遇到这种情况,直译太繁琐,不知道老外是怎么讲的
"四舍六入五留双"是指小数点后有两位数时,如果最后一位小于四就只去掉,大于六就向前进一位,如果是五就保留两位数.
If it is less than 5,drop it and all the figures to the right of it.
If it is more than 5,increase by 1 the number to be rounded,that is,the preceeding figure.
If it is 5,round the number so that it will be even.Keep in mind that zero is considered to be even when rounding off.