求翻译：合同是平等主体的自然人、法人、其他组织之间设立、变更终止民事权利义务关系的协议。民事商业活动中，合同作为买卖的一种协议，是交易的法律形式。合同的内容表现为合同的条款。是什么意思？

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Contract is equal subjects of natural persons, legal persons, between other organizations establishment, change the Termination Agreement between civil obligations. In civil cases of commercial activities, contracts of sale as a form of agreement, is the legal form transactions. The contents of the

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Subject of contract is equal natural persons, legal persons, other organizations establish, change, termination of civil rights and obligations of the agreement. Civil commercial activities, the trading of contracts as a protocol that is the legal form of transactions. Content performance of the con