灰色模型预测至少要几个统计数据

简介：In the light of the torches, a group of armored cavalry carrying long bows, short muskets, and triangular auspicious cloud flags were clearly seen on the streets. Different from the local cavalry that Yangzhou people often saw, these northern cavalry were particularly tall. Although they traveled a long distance, They seemed very tired, but they could not conceal their energy and majesty.