It also analyzes security problems in building payment system, and discusses how to ensure tradingparties' privacy security during the payment process.
本文还对支付系统建设过程中的安全问题进行了分析，研究了在支付过程中如何保证交易各方的安全。
2
It refers to a contract that the two tradingparties agree to buy or sell a certain amount of currency at a fixed date in the future at a specified exchange rate.
指交易双方约定在将来某一时间按约定的远期汇率买卖一定金额的某种外汇的合约。
3
First, Venice's intermediary functions in the Adriatic Sea, where it had dominated the business of shipping for other parties, were lost to direct trading.