IP multicast technique realizes efficient data transmission from one point to multiple points in IP network, and remedies the defects of unicast and broadcast communication.
IP组播技术实现了IP网络中点到多点的高效数据传输， 它能弥补单播通信和广播通信的不足。
In this case, you may want to use multiple points with the same coordinates so that you can have multiple normals at that point.
在这种情况下，你可以使用多个具有同样座标的点，这样在那点上你可以有多条法线。
By optimizing for the problem of single point collocation, it proves that the optimization method is effective, and will has some reference to the problem of locating multiple points.
通过对单点并置问题的优化，证明了该优化方法的有效性，并对多点配置问题也具有一定的参考价值。
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