grayadj.灰色的；暗淡的n.灰色；暗淡v.变灰色；使 ... 变灰色Grayn.格雷(男子名)graybackn.灰鲸；黑头鸦；(美国南北战争时)南部联邦的士兵=greyback.

1. The excellent and defect of gray clustering models in existence were analyzed and the mechanism of the original model was demonstrated in the letterpress.
   摘要分析了现有主要灰色聚类模型的优缺点，论证了灰色聚类原模型的机理。