The ban made sense for the Yugoslav war, as virtually all the fixed-wing military aircraft in the region were under the control of one side — the Bosnian Serbs.
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在虚拟教室中放飞纸飞机是没问题的,不过如果在现实生活中这样做你可是会遇到麻烦。
Letting fly those paper airplanes might be okay in a virtual classroom, but it could get you into real trouble in a real one.