在途中我偶遇一位以前的室友，我们一路上喝啤酒聊天，感慨着世界将会迎来怎样的新秩序。

I ran into an old roommate, and we spent the ride drinking beer and wondering over what the world was coming to.

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我们没有钱，在途经的城市，我们几乎都睡在教堂的地板上。但是我们总是有东西吃。

We had no money and stayed mostly on the floors of churches in the towns we passed through, yet food always somehow presented itself to us.

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在此基础上重点研究了两个问题，即考虑在途库存成本的运输模型以及需求与前导时间不确定的存储模型。

This part studies two problems: transportation model of delivery stock cost and inventory model for unconfirmed lead time.

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