While, the theory of spatial relationships of hyper graph model is improved. It can solve the problems on the spatial relations in space-time object and the relations among spatiotemporal objects.

而对超图模型空间关系理论的改进更好地解决了时空对象的空间关系和时空对象之间关系的问题。

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In this paper, a new data structure of graph, double list, is presented. It is more flexible than other data structures of graph and shows better time and space complexity in graph algorithms.

本文提出了图的一种双链式存储结构，比以往的图的链式存储结构有更好的灵活性，并在图的各种算法的实现上显示了较好的时空复杂性，具有其它存储结构所不具备的各种优点。

youdao

So what we would like to do is to describe what the object does by drawing a graph of time versus space and the graph would be something like this.

然后我们要做的就是描述这个物体的运动,通过画一个"x-t"图,画出来的图就像这样

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