The hydraulic jack generally by this aircraft (main engine), the dynamic system and the hydraulic control system three parts is composed.

液压千斤顶一般由本机(主机)、动力系统及液压控制系统三部分组成。

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Jack Ma, founder of China's search engine Alibaba, is also a key speaker.

中国电商巨头阿里巴巴的创始者马云也是其中一个重要的发言者。

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But economist Jack Strauss says credit conditions threaten the main engine of job growth since two thousand one small businesses.

VOA: special.2009.11.06

With a Yahoo buyback in sight, and full control over the group, founder and CEO Jack Ma can focus on building an even better engine for online trade.

FORBES: As Sales Decelerate In China, Alibaba Sharpens Its Toolbox

Once there, firefighters have to plug their engine into a fire hydrant--the equivalent of a wall jack in the information world.

FORBES: Think You're Wireless? Think Again

History, say Mr Gore's boosters, is already proving him right: last year Jack Smith, the chairman of General Motors, declared that no car company that relied solely on the internal combustion engine would thrive in the next century.

ECONOMIST: 2001: A Gore Odyssey