In the Ming Dynasty, Tainingwei tribe experienced the process of ups and downs; therefore a series of changes took place there.

明代泰宁卫部落经历了由盛至衰的过程，地域也因此发生了一系列变化。

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"Members of a riverine tribe . . . were wading in the swamp, whose water they had impounded in a series of dams"( Alex Shoumatoff )

“某沿岸部落的成员…正在沼泽地里艰难地跋涉，沼泽地里的水已经被他们用一系列的水坝蓄起来了”（ 亚历克斯·肖马托夫）

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An organization is a tribe, or series of interconnected tribes, and a tribe is a system.

FORBES: Support the Tribe

Military sources have also expressed concerns that the tribe may have helped plan a series of recent attacks on civilian targets in North West Frontier Province.

CNN: Blast kills cleric who denounced suicide attacks

The prosecution, portraying the defendants as part of a criminal tribe specializing in contract murders, had charged them with a series of violent crimes.

FORBES: Justice Disserved?