第2部分需求和可能的设计描述了需求和可能的解决方案设计。

Part 2. Requirements and possible designs describes the requirements and possible solution designs to fulfill them.

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他们已经难以管理定单，计划生产材料，跟踪部分需求和管理运输。

They were having difficulty managing incoming orders, planning their backlogs, tracking part requirements, and managing shipping.

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节点1对这些部分和进行求和，从而得出最终的总和。

Node 1 adds these partial sums to get the final sum.

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