在过去二十年间，许多团队都在研发测试远程控制的科研用飞机。 曾在美国西部上空执行任务，原为军用飞机的“捕食者B”经过国家航空航天局修整改进，更加精巧完善。
During the pasttwo decades, several teams have developed and tested remote-controlled scienceplanes, and NASA already flies the smaller Predator B — also of military origin— over western US wildfires.
一架二战老式战机周五在美国西部内华达州举办的航空表演中坠毁（冲向人群），造成飞行员和至少其他2人当场死亡，受伤群众超过50人，大约15人重伤。
World War II vintage fighter plane crashed at an air show in the western U. S. state of Nevada Friday, killing the pilot and at least two other people, and injuring more than 50 - about 15 critically.
一架二战老式战机周五在美国西部内华达州举办的航空表演中坠毁（冲向人群），造成飞行员和至少其他2人当场死亡，受伤群众超过50人，大约15人重伤。
World War II vintage fighter plane crashed at an air show in the western U. S. state of Nevada Friday, killing the pilot and at least two other people, and injuring more than 50 - about 15 critically.
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