从功能的角度来看，必须根据业务需求对它进行调整。
From the functional point of view, you have to adopt it to your individual business requirements.
但是，从全球范围来看，沙和其他材料的需求与日俱增，供应却日渐变少。
But global demand for dwindling supplies of sand and other materials is mounting.
从对约定的综合经验来看，上面的业务需求是有序的，位于顶部的是最普遍的。
From the combined experience of the engagements, the business requirements above are ordered with the ones at the top being the most common.
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