China's search engine market reached 946.6 million yuan ($131 million) in the fourth quarter -- almost double from a year earlier, according to a research firm.

根据一家调研公司的数据，中国搜索引擎市场在第四季度达到了9.466亿元（1.31亿美元）的规模—跟前一年比，几乎翻了一倍。

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But until they are widely available, simple changes to the internal combustion engine-and the way we drive-could as much as double gas mileage.

但是，在这些汽车还没有广泛使用之前，对内燃机简单的改变以及我们驾驶方式的改变能使汽油里程加倍。

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The test results show the LPG/diesel double fuel engine can obtain similar performance to a diesel engine.

试验结果表明，液化石油气-柴油双燃料发动机可得到与柴油机相类似的性能。

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With its bright, clear dial and large plungers and crown, the Bulova stopwatch was considered ideal for double-checking the duration of engine burns.

FORBES: Apollo 15 Bulova Moon Watch Up for Auction at Bonhams

The uncanny fusion of actual and virtual space utilizes dual stereoscopic projections, mirrors, a double-sided projection and game engine software customized by the artists.

ENGADGET: Museum of The Moving Image plans multi-million dollar updates with HD, 3D

The challenge is building as much influence as possible over what people are saying about you, a concern that has U.S. companies now putting a third of their online budgets into their own sites, double what they spend on search-engine marketing, says ad-spending research group Outsell.

FORBES: Don't Let The Customers Drive