Introducing the advantages and disadvantages of double-engine dragged trolley system, the paper describes a programmable controlled system for synchronic control of double-engine.

介绍电机车双机牵引的优点和存在问题。采用可编程微机控制作为双机牵引的控制系统。

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The firm’s president, David Hess, has said the new engine could double the size of the company, which had sales of nearly $13 billion last year.

公司总裁大卫•汉斯说，这款新发动机可以把公司规模扩大两倍，该公司去年的销售额为13亿美元。

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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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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