The finding confirms that predecessors of the Inca known as the Tiwanaku used mind-altering substances, and hints that the civilization relied on far-reaching trade networks to obtain the drugs.

这个发现证实在印加的Tiwanaku的一些先驱者们使用能改变精神状态的物质，并且暗示了他们的文明是建立在有广泛影响的交易网上，从而得到这些药物。

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But unlike his predecessors who were happy enough to mind their tiny kingdoms, sorting out marital squabbles and gathering revenues from land and shops, the new generation of Syiems like Sing feel they have to address the needs of their people.

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Unlike its research-intensive predecessors, the Univac also was built with business applications in mind.

CNN: Machines on a mission