Because of the stronger adaptability to unknown terrain of a hopping robot than a traditional mobile robot, a hopping mechanism using a fuel gas-actuated single-acting engine is developed.

由于弹跳机器人较传统移动机器人具有较强的未知地形适应性，研制了一种燃气驱动的单动发动机式弹跳机构。

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Then,the car automatically switches to a gas-powered engine, acting as a generator that can power through 483 more kilometers.

VOA: standard.2010.07.30

That has caused some alarm because China was acting as the engine of global growth.

ECONOMIST: Buttonwood

We want to help more people start new schools, acting as an engine for social mobility in every region of the country.

BBC: NEWS | UK | UK Politics | In full: George Osborne speech

Me completely reorganizes your home screen by acting as a search engine and Siri-like virtual assistant.

FORBES: Everything.Me Wants To Be The Google For Mobile, Hits 150K Downloads