... Military rotary wing aircraft (军用螺旋桨飞机) Recreational aircraft (娱乐用飞机) Spaceships (宇宙飞行器) ...
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One was the new category of recreational aircraft the FAA sanctioned in 2004.
其中一个是联邦航空管理局在2004年批准的新型娱乐性飞行器。
Gyroplanes have a significantly higher fatal accident rate than other classes of recreational aircraft.
表明旋翼机比传统机的事故率要高很多。
Indeed, there are all kinds of rules in America and elsewhere for various forms of lightweight recreational aircraft.
事实上，在美国和其它任何地方都为各种轻型娱乐用飞行器制订了各种各样的规定。
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