The power margin of the optical fiber relay system is determined from the losstransfer function.
利用损耗传递参量确定中继系统功率容限；
2
The cost of delay is a deadweight loss, whereas a higher price would be merely a wealth transfer to the sellers and would finance an increase in supply.
延迟的成本是额外的损失，然而，高价可能仅仅是对售卖方的财富转移，并能为供给的增加提供资金支持。
3
Risk of Loss: the risk of the commodity shall transfer to the buyer.