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It is easy to see that OvR only needs to train N classifiers, while OvO needs to train N (N-1)/2 classifiers, so the storage overhead and test time overhead of OvO are usually larger than OvR. However, in training, each classifier of OVR uses all training samples, while each classifier of OVO only uses samples of two classes. Therefore, when there are many classes, the training time cost of OVO is usually smaller than that of OVR. As for the prediction performance, it depends on the specific data distribution, which is similar in most cases.爱奇艺甜宠奇幻喜剧#恋爱生物钟#主演：彭楚粤,王承渲　　本片是翻拍自悬疑片大师希区柯克1954年的经典作品《完美的谋杀案》。就算天启能写出一朵花来。　　传说里，她站在荒野，就这样，痴痴的等待。CCTV News (Focus Interview): The goal of "Two Hundred Years" is not only the grand blueprint for China's development, but also the call of the times for China to move forward. In General Secretary Xi Jinping's 19th Congress report, the "two hundred years", especially the goal of the second hundred years, has been given new connotations. The original goal of building a prosperous, democratic, civilized and harmonious socialist modern country by the time New China is founded 100 years ago is defined as "a prosperous, democratic, civilized, harmonious and beautiful socialist modern power". A word has been added here, beautiful. One word has been changed, powerful country. Obviously, the requirements of the new goals are even higher. Not only that, the task of achieving new goals is also heavier. The new second century goal is divided into two stages. The first stage is from 2020 to 2035. In 15 years, socialist modernization will be basically realized. The second stage is from 2035 to the middle of this century, striving for another 15 years to finally build our country into a prosperous, democratic, civilized, harmonious and beautiful socialist modern power. So, how should we understand this far-reaching strategic arrangement for the development of socialism with Chinese characteristics in the new era?板栗就奉承道：就是。