About Down

Source:http://unity3d.com/unity/features/asset-importing

Down /K:[]/ (ad.) 向下;在南方(Source: 奇摩字典)

範例:Down may refer to:Relative direction, where down is the direction towards the centre of gravity of a celestial object. (Source:http://en.wikipedia.org/wiki/Down)

中文翻譯: 向下可以指:相對方向，在向下的方向是對重心的天體。