在中间市场的业务及其业务数据结构中，存在比企业业务数据中更多的易变性。

There is more volatility in mid-market businesses and their business data structures than there is in enterprise business data.

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森林资源档案数据具有易变性和时效性，森林资源档案数据的及时更新将有助于林业主管部门对森林资源状况的掌握。

The timely updating of the forest resources inventory data, which is changeable and time-limited, would help the forestry directors to understand the forestry resources status.

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