生产契约曲线的英文：
production contract curve

production是什么意思：
n. 生产；产量；排演；产生；演出，作品，产品

productive farmland; his productive years; a productive collaboration.
多产的农田；他的多产年；多产的合著。

The products are of poverty.
这批产品质量很差。

Mechanic Products
机械产品学

contract是什么意思：
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

curve是什么意思：
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