在过去一二十年里，采购和运输行业已经开始转型。
The field of buying and shipping supplies has been transformed in the last decade or two.
在此基础上，指出采购和运输是本文的研究重点。
On this basis, the procurement and transportation is the focus of this study.
在储备量不能满足需求的情况下，建立一套快速便捷的采购和运输程序。
A rapid and convenient stocking and transportation procedure should be developed to meet the demand of disaster relief.
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