两组住院天数、住院费用比较的翻译：Two sets of inpatient days, inpatient cost comparison 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

Two groups of hospital stay, hospital cost comparison

Two sets of inpatient days, inpatient cost comparison

Two group of in hospital numbers of days, in hospital expense comparison

Two nights in comparison, hospitalization costs

Two sets of inpatient days, inpatient cost comparison