求翻译：发、承包双方应按照国家标准《建设工程工程量清单计价规范》（GB50500—2008）的规定，在施工合同中约定人工、材料、机械等市场价格变化的风险范围和幅度及超出幅度的调整方法。是什么意思？

Hair, the two contracting parties shall be in accordance with the provisions of the national standard "construction project list pricing norms (gb50500-2008) in the construction contract agreed upon the scope and extent of risk of changes in market prices of labor, materials, machinery, etc., and be

Both sides should be made, the contractor in accordance with the national standards project construction specifications list price of 50,500 - 2008 (GB), agreed in the contract in the construction labor, materials, machinery, and other market prices change scope and magnitude of risk adjustment and

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, Contracting Parties shall, in accordance with the national standard of the codes for engineering Bill pricing of building engineering (GB50500-2008) provisions of the conventions in the construction contract labor, materials, machinery and other price changes in the scope and extent of the risk an

Sends, contracts both sides to be supposed to defer to the national standards "Construction project Resilience Detailed list To count Price Standard" (GB50500-2008) stipulation, agrees current price on market declension and so on the man-power, material, machinery in the turn-key contract risk scope