Traditional requirements engineering, the first step in the software development process, determines the functional and nonfunctional needs or conditions that must be met for a new product or system.

作为软件开发流程中的第一步，传统需求工程确定新产品或系统所必须满足的功能性和非功能性需求或条件。

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Although karst pore system was packed again after forming, it provides conditions for the development of burial corrasion pores.

岩溶空隙系统虽然在形成后又被充填，但为埋藏溶解孔隙的发育提供了条件。

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The ample and essential conditions of seam gas formation are the existence and development degree of the basin, system and zone of seam gas.

煤层气盆地、煤层气系统、煤层气区带的存在及发育程度是煤层气藏形成的充分与必要条件。

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European skills development models remain diverse reflecting the need to ensure coherence at national level between the education system and labour market conditions and institutions.

UNESCO: Education