两星的起始距离约为月面直径，走过这段距离所用的时间约为5秒，做加速直线运动。
The distance between the two stars before the first one moved is about the same as the diameter of the moon. It took the first star about five seconds to move through this distance.
图层之间的起始高度和距离的各种组合将在特定的距离和视角上生成不同的体积效果。
Various combinations of starting altitude and distance between layers will produce different volumetric effects at specific distances and viewing angles.
绝大多数的区域描述报告往往聚焦在以城镇内某一个起始点出发，一定驾驶距离所勾勒出来的范围内。
Most area profile reports are used to focus on an area that falls within a defined drive-time distance (also known as a contour) from a central point in a particular city or town.
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