Pilot study on contract purchase of priority health interventions service 合同购买重点卫生服务试点研究
Ratio of the value of futures contracts purchased or sold to the value of the cash commodity being hedged , a computation necessary to minimize basis risk 所买卖的期货合约价值与要进行套保的现货商品价值之间比值,用来计算最小化基差风险。