Shortly after 5 p.m., the Flyer lifted off from the parade ground. The aircraft was a skeletal structure of spruce and muslin, its twin propellers driven by a small gasoline engine. Unlike modern airplanes, it had no enclosed cockpit, no seatbelts, and no protective structure. The pilot and passenger lay side by side on the lower wing, exposed to the wind.
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。新收录的资料对此有专业解读
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as I recommend you do when deciding if a paper is worth reading.。业内人士推荐新收录的资料作为进阶阅读
AFP via Getty Images。关于这个话题，新收录的资料提供了深入分析
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