As previously noted, it is true that unit testing and Design by Contract accomplish similar objectives by different means.

正如前面提到过的，单元测试和契约式设计用不同的方式实现类似的目标。

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Unit testing defines a written contract about the behavior of each unit.

单元测试定义一个有关每个单元的行为的书面合同。

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Futures markets trade futures contracts, and the smallest unit that can be traded is one contract.

期货市场交易的就是期货合约，最小的交易单位是一份合约。

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The company's first-half profit rose only 0.5% from a year earlier, in part because of deeper losses from its contract handset-making unit.

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In addition, the short-cycle businesses concentrated in the unit are more vulnerable to near-term contract delays and terminations as the government grapples with ways of reducing budget deficits.

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In 1982 Jabil went into high-tech with a contract to make add-on boards for the IBM Personal Computer unit in Boca Raton, Fla.

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