Principal: a principal can represent anything from users, clients and servers to cells.

主体：主体可以表示从用户、客户端和服务器到单元的任何实体。

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Foreign group UUIDs: the UUIDs of the groups registered in remote cells to which this principal belongs.

外来组uuid：此主体所属的、在远程调用中注册的组的UUID。

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The invasion and spread of cancer cells to other parts of the body, known as metastasis, is a principal cause of death in patients diagnosed with breast cancer.

在诊断为乳腺癌的病人中，癌细胞侵袭与扩散至身体的其他部位（即转移）是导致病人死亡的主要原因。

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Working at the leading edge of research on cellular biology and genetic skin disorders, Fuchs was the first to precisely describe keratins - the principal structural proteins of skin cells - and identify diseases caused by mutations in the keratin gene.

VOA: standard.2010.03.29

The task-force's principal recommendation is expected to be that the fleet should gradually convert to fuel cells.

ECONOMIST: Clean living in Iceland