您可以利用四象限技术来了解每个主体关于合同的，就预算、时间、可交付的内容，合法问题等方面的需求。

You can use the four quadrant technique to understand each subject's needs with respect to the contract in terms of budget, time, deliverables, legal issues, and so on.

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就国际贸易合同的共同特征而言，最典型的可以说是内容的合法性，条款的完整性以及语言的准确性。

As for the common features of international business contracts, legality in contents, completeness in clauses and accuracy in language may serve as the most typical items.

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尽管双方的约定系形成合同的必要条件，但难点可能在于什么内容才是构成合法充分的约定。

Although agreement between the parties is essential to the creation of contract, the question of what constitutes legally sufficient agreement can be difficult.

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