这对探讨火山喷发规律，对火山地质地貌的准确描述均具有积极作用。
The knowledge is possessed of active significance for us to research volcanic activity.
这一转移，不仅具有其客观必然性，而且具有十分重要的积极作用。
The transfer occurs inevitably and has a positive effect on national economy.
不过，对于明年经济而言，这种安排总体具有明显的积极作用。
Still, it would be a noticeable net positive for the economy next year.
不过，对于明年经济而言，这种安排总体具有明显的积极作用。
Still, it would be a noticeable net positive for the economy next year.
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