无回执但参加会议的人数和总回执人数之间的比值的翻译：Participation of non-receipt of but the ratio of between the number and the total number of receipts 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

The ratio between the receipt but the number of people attending the meeting and the total receipt number

Participation of non-receipt of but the ratio of between the number and the total number of receipts

But does not have the receipt to attend the conference between the population and the total receipt population ratio

No Receipt number but participate in the Conference and the total receipts of the ratio between

Participation of non-receipt of but the ratio of between the number and the total number of receipts