Unit tests test the Rails models, while functional and integration tests ensure the Rails application works as designed at a higher level.

对Rails模型进行单元测试，然后通过功能测试和集成测试在更高层次上确保 Rails应用程序符合设计预期。

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If the technology works as designed, he says, it could spawn a new breed of aircraft engines capable of much higher speeds and performance.

他认为，如果能达到设计目标，这项技术就有望带来一种新的飞机发动机，而且在飞行速度和性能上都要强得多。

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And when it's applied, recycling generally works as designed, turning waste paper into fresh paper or old aluminum cans into new ones.

一般来说，回收按照预计得到实施是可行的，比如把废纸制成崭新的纸张，或者把废旧铝制易拉罐制成新产品。

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And when it's applied, recycling generally works as designed, turning waste paper into fresh paper or old aluminum cans into new ones.

一般来说，回收按照预计得到实施是可行的，比如把废纸制成崭新的纸张，或者把废旧铝制易拉罐制成新产品。

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