An emergency extension system extends the gear mechanically if hydraulic or electrical power is lost.

如果液压系统或者电源出现故障，应急放出系统会靠重力机械地放出起落架。

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The extension provides an opportunity to improve the relationship between the school complex and the public space in the street currently a blank wall of the emergency shelter.

扩建给学校和城市公共空间提供了改善关系的契机——有一个可供紧急避难的场所。

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Developing an efficient Railway Emergency Communication System was important to reduce the loss of accident, prevent the extension from the disaster.

开发高效的铁路应急通信系统有利于减少事故损失，防止灾害扩大，这对于保障铁路的运输安全是至关重要的。

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But the "baseline" for all the deficit forecasts assumes that neither President Obama's temporary payroll tax cut, nor the emergency extension of unemployment benefits will be extended into 2012.

BBC: The US debt deal and the recovery

And I called for the extension of emergency relief like unemployment insurance and health benefits to help those who've lost their jobs, while boosting consumer spending and promoting job growth.

WHITEHOUSE: Retrofitting for Energy Efficiency and New Jobs

Extension of Emergency Unemployment Insurance benefits for 2 million people: The agreement will prevent 2 million people from losing UI benefits in January by extending emergency unemployment insurance benefits for one year.

WHITEHOUSE: The White House