消费信贷服务作为一种商品，有着它的需求规律。

Consumption credit service, as a commodity, has its own law of demand.

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“信息服务”的价格厘定主要受价格差别与需求规律的左右。

We hold that the pricing of information service is determined by both pricing spread and demand rule.

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了解当今大学生利用图书馆文献信息资源的需求趋势和文献信息的需求规律，充分开发、利用图书馆信息资源是高校图书馆追求的目标。

It is the goal of college libraries to find out the tendency in documentation information resource demands and their rules among college students; and to put these resources to full use.

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