同年，美国联邦航空管理局要求将这些实际上从未是黑色的盒子刷成橙色或黄色，以提高能见度。
The same year, the Federal Aviation Authority required that the boxes, which were never actually black, be painted orange or yellow to aid visibility.
美国管理民用航空的政府机构联邦航空管理局本月宣布了新规定，以消除飞行员疲劳。
The Federal Aviation Administration (FAA), the government agency that regulates civil aviation in the United States, announced new rules this month to combat pilot fatigue.
联邦航空管理局仅仅判定了这个物体不是一架飞机。
The Federal Aviation Administration has determined only that the object was not an aircraft.
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