For the sake of timely and definitive decision-making, the project should identify a single leader in the following key project roles.
为了获得及时和权威的决定，项目中需要在如下的关键任务中明确一个单一的领导者。
In systems too large for a single group, there are layers of decision-making: the nomads of the Sahel, for example, used to have overlapping informal authorities up and down the Niger river.
在一个对于单一群体来说非常大的系统里，有着许多决策层：例如萨赫勒的游牧民族，过去有着许多互相重叠的非正式权威遍布于尼日尔河上上下下。
A single level grey decision making model, which is aimed at some existing problems on present decision of purchasing equipments, is proposed and its applications are shown with examples.
针对目前设备采购决策中存在的问题，提出一种单层次灰色决策数学模型，并以实例说明其应。
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