1 . 团簇
theoretical study of the infrared spectrum of clusters., 团簇红外吸收谱的理论研究.
2 . 一簇簇
both trees have clustersof white flowers in early June .两棵树在六月初都会结满一簇簇白花。
3 . 团
(3)the formation rules, structures and dynamics of clusters;(3)团簇形成规律、结构及动力学;
4 . 成串
small bushy tree of southeastern United States having profuse clustersof white flowers ., 美国东南部的一种小矮树 , 开大量成串的白色花朵.