求翻译：这次白云宾馆选择采购的方式进行为宾馆采购一批急需用品.采购过程有着不同方面的风险，有内部和外部的因素，我们是如何预防这些风险和采取什么样的措施。另一方面采购人员是如何与供应商进行谈判的.是什么意思？

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Procurement of the Baiyun hotel selected for procuring needed supplies for the hotel. the procurement process have different risks, internal and external factors, how do we prevent these risks and what measures to take. The other hand is how to negotiate with suppliers for procurement staff.