...The river is more than 400 miles long. In its fertile...
aChain of Command means the continuous line of authority that extends from upper levels of an organization to the lowest levels of the organization and clarifies who reports to whom. 指挥系统意味延长从组织上层对组织的最低的水平并且澄清的连续的职权范围向谁报告谁。[translate] ...