The covenantee cannot have both the promised performance and some other performance which he agrees to accept.

受约人不能既有承诺的表演，也不能有他同意接受的其他表演。

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I promised you an article about benchmarks and performance measurement, but so far all you've gotten is a history lesson and a rehash of Sun's HotSpot white papers.

我向您许诺了一篇关于评测和性能测量的文章，但是迄今为止，您得到的只是历史的教训和Sun的HotSpot白皮书的老调重谈。

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Hardware acceleration is one performance enhancer that Google is just beginning to show to developers. Rakowski promised end users would see it soon.

硬件加速是Google刚刚呈现给开发者实现性能增强的一个技术，拉科·斯基承诺终端用户很快就会体验到。

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The manufacturing process for the pre-cooler technology is already proven, but investors will be looking to see that the module has a stable operation and can meet the promised performance.

BBC: Key tests for Skylon spaceplane project

This week the protesters promised a repeat performance unless ministers cut fuel taxes by Wednesday.

ECONOMIST: The effects of high fuel prices

Much like ultrabooks, Centrino processors promised better battery life and overall improved performance, as well as more integrated wireless connectivity.

FORBES: Move up http://i.forbesimg.com t Move down