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。

youdao

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。

youdao

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。

youdao

Players emerged in clusters, often grouped around an outstanding teacher.

ECONOMIST: 120 players from 35 countries have a ball

When it arrived in America it was detected within months thanks to the vigilance of the country's Centres for Disease Control and Prevention in noticing clusters of a previously rare skin cancer that is often a symptom of immune-system collapse.

ECONOMIST: Bird flu and public health

Indexing clusters investment assets in securities which represent past success, are widely owned, and often fully valued.

FORBES: Focus On Assets And Liabilities When Planning Your Portfolio