求翻译：如必须对合同条款进行改动时，当事人双方须共同签署书面文件，作为合同的补充，并报同级政府采购监督管理部门备案。是什么意思？

If it is necessary to change the terms of the contract, the parties shall jointly sign a written document, as a supplementary contract, and report the same level government procurement supervisory and administrative department.

If it is necessary to make changes to the terms of the contract signed by both the parties, when a written document, as a contract with a supplement to and reported levels of government procurement oversight management record.

When must carries on the modification to the contract provision, litigant both sides must together sign the written document, took the contract the supplement, and the newspaper same level government procurement management by supervision department sets up a file.

If you have to make changes to the terms of the contract, the Parties shall be jointly signed written document, as a complement to the contract and report to government procurement supervision and management departments at the same level for the record.

If you have to make changes to the terms of the contract, the Parties shall be jointly signed written document, as a complement to the contract and report to government procurement supervision and management departments at the same level for the record.