交换契约曲线的英文：
exchange contract curve
n. 交换，互换，交流；兑换，汇率；交易所
v. 交换，互换；交流；兑换
regional exchange
美国在纽约以外地区的证券交易所
This exchange takes place in the foreign exchange market.
汇兑是在外汇交易市场上进行的。
He gambles on the stock exchange.
他从事股票投机。
n. 契约；合同；婚约
v. 感染；（使）缩小，缩短，收缩；订契约
The contract was negotiated.
合约已谈妥。
confidentiality of contracts
合同的保密性
Renewal of contract
合同的续订
n. 曲线，弧线，曲面，弯曲；曲线球
v.（使）沿曲线运动
Joining Convex (Outer) Curves to Concave (Inner) Curves
缝合凸出的弯曲部位和凹曲部位
The road curved sharply to the right.
道路有个急转弯拐向右边。
To bend or curve downward;stoop.
弯向下弯曲；俯曲