发包方和承包方应当订立承包合同，约定双方的权利和义务。
The contractees and contractors should sign land use contracts to define each other’s rights and obligations.
发包方和承包方应当订立农业承包合同，约定双方的权利和义务。
The party awarding contract and the contractor shall conclude an agricultural contract to define the rights and duties of both parties.
合同价款是当事人双方在订立合同时，协商和讨论的实质性核心条款。
Contract price is the substantive term by the discussion and consultation of the both sides of parties.
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