You can see stars in clusters in the night sky. 看夜星群。
The men clustered together round the fire and sang songs. 聚集篝火周围唱歌。
A new clustering algorithm is presented. 聚数据挖掘很重。
clustering [ noun ] a grouping of a number of similar things <noun.group> a bunch of treesa cluster of admirers
Cluster \Clus"ter\, v. i. [imp. & p. p. {Clustered}; p. pr. & vb. n. {Clustering}.] To grow in clusters or assemble in groups; to gather or unite in a cluster or clusters.
His sunny hair Cluster'd about his temples, like a god's. --Tennyson.
The princes of the country clustering together. --Foxe.