To avoid that bad consequence and increase optimism, Seligman recommends adding in two more steps, D and E
为了避免坏的结果，增加乐观情绪，Seligman建议增加两个步骤，D和E
The key between the two black keys is D, and the one to the right is E. Try naming them.
“在二支黑色的钥匙之间的钥匙是 D ，而且权利的那一个是 E。 尝试取名他们”。
After analysing manifold color clustering methods, we present two unsupervised methods based on 2-d chroma plane, i. e, the density-based triangulation method and the GA-based optimization method.
在分析了多种颜色聚类方法的基础上，提出了2种无监督的二维色度平面颜色聚类方法：基于密度的三角化方法和遗传算法优化方法，并通过实验对2种方法进行了比对分析。
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