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6 取决于您的镜头有多好）对于长颈鹿和犀牛 – f8。　　the problems are: 1) speed of light is constant; 2) time has direction; 3) the distance between origins of inertial systems can be veried。根据希尔的说法，该公司对津巴布韦亮点之旅的需求 - 以前每周最多可容纳34名游客 - 几乎枯竭。