求翻译：The transportation environment impacts the range of decisions that can be implemented in a logistical system. Unlike most commercial transactions, transportation decisions are influenced by six parties: (1) shipper; (2) destination party, traditionally called the consignee; (3) carriers and agents; (4) government; (5) Internet; and (6) the public. Figure 11-1 illustrates the relationship among the involved parties. To understand the complexity of the transportation environment it is useful to review the role and perspective of each party.是什么意思？

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