参与竞争的两种无人机均为单一扇涡轮驱动的无尾翼飞行飞机，除此以外，X - 47 B被设计用于航母作战，具有可折叠机翼，并装备有尾部吊钩。

While both competitors are tailless flying wings powered by single turbofans, the X-47B was designed for carrier operations and features folding wings and a tail hook.

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若以目前商用客机而言，答案是“涡轮扇引擎”，它是近数十年来最新的演化成果。

For virtually all commercial airliners today, the answer is "turbofan engines," the latest in a decades-long evolution.

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一般涡轮叶片的运作靠流动液体动能转移到涡轮扇叶片。

A regular blade turbine operates by transferring kinetic energy from the moving fluid to the turbine fan blades.

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