Witnesses recall seeing the single engine plane weaving around before crashing to earth.

目击者记得这架单引擎飞机在坠地前像没头苍蝇一样上下翻飞。

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Fewer than a quarter of the promised jobs have materialised and not a single engine has rolled off the production line.

之前所承诺的工作岗位，现在兑现的不足四分之一，而且在组装线连一台机车也没有产出过。

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Although the engines are extremely reliable, one could fail, and the plane could continue to fly safely with that remaining single engine.

尽管引擎是极为可靠，就算其中一个引擎发生故障，飞机使用剩余的一个引擎也能继续安全飞行。

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She wrote about their flight in a single-engine airplane over Canada and Alaska to Japan and China.

VOA: special.2009.06.28

Airlines can improve their fuel conservation by using single engine taxiing and electric-powered vehicles on the ground.

BBC: How eco is your airline?

You can circumnavigate the entire island in half a day, and would be unlikely to hear the roar of a single engine.

BBC: Singapore��s curious bicycle island

Knowing it's there is comforting, especially as you and the people you love most are winging over the Rockies on a single engine and propeller.

FORBES: Magazine Article