Moreover, the reported cancers in these clusters are often a collection of different types of cancer with no common characteristics and hence unlikely to have a common cause.
此外，报道的成群癌症病例常常包括不同类型的癌症，没有共同的特征，并因此不可能有共同的起因。
Spasms tend to occur upon awakening or after feeding, and often occur in clusters of up to 100 spasms.
痉挛倾向于在清醒状态或喂养之后出现，经常以100次痉挛为一簇出现。
In earlier calculations, the initial configurations of the metallic clusters were often assumed as the fragments of bulk solids such as face centered cubic (FCC) or body centered cubic (BCC).
早期的模拟研究，通常采用具有面心立方(FCC)或体心立方(BCC)的体相金属的片断作为金属团簇的初始构型。
Some galaxies occur alone or in pairs, but they are more often parts of larger associations known as groups, clusters, and superclusters.
一些星系单独出现或成对出现，但它们更经常以叫做星群、星团和超级星团的较大的星协的组成部分来出现。
Any of numerous low-growing herbs of the genus Arenaria, having small, usually white flowers often grouped in cymose clusters.
蚤缀，鹅不食：任一种蚤缀属的杂生矮小的草，开有小的通常呈白色聚伞状的花簇。
The name derives from their tendency to occur in clusters, often occurring at the same times every day.
集束性头痛之所以得此名，源于它们倾向于阶段性发作，常常在一天的同一时间来临。
In addition, the cells are trapped in a matrix of mucus, where they are often massed in large clusters of varied kinds of cells.
并且，这些细胞被黏液基质包裹，通常还会与其他各种类型细胞混杂形成巨大细胞团。
In addition, the cells are trapped in a matrix of mucus, where they are often massed in large clusters of varied kinds of cells.
并且，这些细胞被黏液基质包裹，通常还会与其他各种类型细胞混杂形成巨大细胞团。
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