The first well-known UFO sighting occurred in 1947, when businessman Kenneth Arnold claimed to see a group of nine high-speed objects near Mount Rainier in Washington while flying his small plane.
首个著名的飞碟目击事件发生在1947年，一个叫Kenneth Ar nold的商人声称他在华盛顿的雷尼尔山附近玩小型飞机模型时看到了一组9个高速移动的物体。
They reported sighting the plane.
他们报道看见了那架飞机。
An indicator or a sighting apparatus on a plane table, used in angular measurement.
旋标装置飞机控制板上的指示器或观测仪，用来测量角度。
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