The first was to use carbon composites to make fan blades (the big ones you do see) far lighter than the metal ones of the time.

第一是使用碳复合材料制造的风机叶片(你在飞机上看到的最大叶片)，这种叶片远轻于当时金属制的叶片。

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These are not the huge fan blades you see when boarding, but are buried deep in the engines.

它们可不是家用风扇的叶片，而是深嵌入引擎内部的叶片。

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One way to increase the efficiency of a high-bypass jet engine is to turn the fan into an open rotor, a bit like returning to propellers, but using two rings of stubby counter-rotating blades.

提高高旁通飞机引擎的方法之一就是把风扇变成开放式旋翼，有点回归于螺旋桨的味道，但要使用两圈粗短的反旋桨叶。

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Adams, 49, a Blades fan as a boy, has been linked with the job after Gary Speed left to become Wales boss.

BBC: Port Vale's Stuart Tomlinson ignoring Adams rumours

Its three sturdy magnesium blades fan out to reveal solar panels.

FORBES