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To keep costs low, the Black Knight shares a weapons systems and engine parts with the manned Bradley Fighting vehicle.

为了使成本较低，黑骑士采用的系统和发动机均与人为驾驶的布莱德雷战车相似。

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The primary goal of the spammers is to increase the search engine ranking for their client sites, in a process called "black hat search engine optimization (SEO)" or "Spamdexing".

垃圾信息散布者的主要目的就是提高其客户站点在搜索引擎的排名，这个过程被称为 “黑帽式搜索引擎优化（SEO）” 或 “垃圾索引”。

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The carving of a steam engine in black granite rests on top of a plinth, which includes a montage of images representing the railway industry.

BBC: Rail workers' memorial at National Memorial Arboretum

Others reported seeing a black, boxy vehicle with its engine running but no one inside on Clements' street.

CNN: Focus on paroled ex-gang member in prison chief's slaying

However, the two other black boxes - which record over a hundred flight parameters, including engine performance - did work.

BBC: Ukrainian, Russian papers assess plane crashes