IRM is considered as a lightweight solution because the main role of the engine is to provide life cycle management retention only.

IRM被认为是一种轻型的解决方案，因为引擎的主要作用仅仅是提供生命周期管理保持。

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The teams recommended a variety of improvements in lightweight composite structures, heat- and stress-tolerant engine materials, and aerodynamic modeling that can help bring their ideas to reality.

这些团队为轻比重的合成材料结构、耐热和耐应力的发动机材料、有助于实现其设想的空气动力学模型提出了不同的改进建议。

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As you can probably see by this point, Gaelyk makes building lightweight Web applications on Google app Engine a breeze.

至此，您或许可以发现Gaelyk使得在Google App Engine上创建轻量级Web应用程序轻而易举。

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That'll let Raytheon cut the cord and install an lightweight internal combustion engine of some sort, he hopes, while letting the exoskeleton keep on truckin' for over eight hours (a military requirement) before running out of fuel.

ENGADGET: Raytheon's Sarcos XOS 2 military exoskeleton just does the heavy lifting -- for now

Airbus' A380 superjumbo and Boeing's upcoming 787 Dreamliner both use new engine designs, lightweight composite materials and advances in aerodynamics to improve performance, increase fuel efficiency and lower emissions.

CNN: Flight of biofuel fancy?

His lightweight aircraft, with a 25 horsepower engine and made of ash, went into mass production.

BBC: Pilot recreates Channel crossing