微软ceo鲍尔默:Cost per credit hour是什么意思？怎么收的这个费？

Cost per credit hour是什么意思？怎么收的这个费？ 时速用英文翻译是不是speed per hour (=knots per hour)节(海里/小时) forwarding: as per your instructions and at your cost是什么意思？ labor cost per units is sometimes could the labor content of the product.在线等! labor cost per units is sometimes called the labor content of the product.在线等,谢谢了 Credit Cards credit derivatives PER是什么意思? CREDIT COOPERATIVE OF CHINA