P 2 P架构下流媒体视频是在世界各地的用户那里都放上文件的一个拷贝然后在用户索取的时候通过多点提供给用户。
A P2P approach for video streaming would be to hold a copy of a file in different parts of the world and serve it from multiple points to users.
窗户和立面的比例经过精心计算，保证建筑不会过多地消耗取暖所需要的能源，严格按照需求供给。
Windows and facade proportion calculated, ensure the building too much needed energy consumed for heating, in strict accordance with demand and supply.
是否有供应不足或者供给过多？
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