它是归于国家力量才能办成的事，因为它需要不间断的维持保养。
It has to be something that comes within the country, because it requires so much ongoing maintenance.
通过最小限的部品的维护保养，来维持热风幕正常的运行。
To maintain the normal operation of the hot air curtain through the maintenance of the smallest part of the product.
维持生态平衡的主要道德规范是节制、保养、护法。
The main moralities of maintaining the balance of ecology include refrainment, preservation and protective laws.
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