Some scholars argue that the concentration of water within the urban core of these sites provided a centralized source of political authority for Maya elites based largely on controlled water access.
Their resistance to outsourcing, concentration on core operations and production capabilities, and focus on the pulse of fashion have made them one of the most successful clothing retails.
他们拒绝外包，专注于核心业务和产能，以最新时尚为推动力，这些造就了服装零售业最成功的一个品牌。
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"The core of a pineapple contains twice the bromelain concentration of the surrounding fruit," says Dr Glenville.